./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.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_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/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_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/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_90c008e1-ba1f-4dbc-930f-a75055436b61/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 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:09,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:09,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:09,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:09,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:09,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:09,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:09,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:09,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:09,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:09,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:09,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:09,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:09,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:09,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:09,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:09,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:09,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:09,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:09,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:09,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:09,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:09,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:09,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:09,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:09,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:09,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:09,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:09,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:09,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:09,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:09,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:09,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:09,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:09,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:09,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:09,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:09,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:09,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:09,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:09,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:09,552 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:34:09,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:09,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:09,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:09,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:09,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:09,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:09,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:09,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:34:09,599 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:09,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:09,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:34:09,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:34:09,601 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:09,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:34:09,602 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:34:09,602 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:34:09,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:09,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:34:09,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:34:09,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:34:09,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:09,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:09,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:09,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:09,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:09,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:34:09,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:09,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:09,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:09,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:09,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:09,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:09,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:09,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:09,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:09,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:34:09,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:34:09,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:09,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:09,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:09,611 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_90c008e1-ba1f-4dbc-930f-a75055436b61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 [2021-11-13 01:34:09,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:09,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:09,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:09,992 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:09,993 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:09,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-13 01:34:10,074 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/65f334e2f/f866dab696594e2ba25710a3b690c1b5/FLAG563b084bd [2021-11-13 01:34:10,760 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:10,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-13 01:34:10,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/65f334e2f/f866dab696594e2ba25710a3b690c1b5/FLAG563b084bd [2021-11-13 01:34:10,987 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/65f334e2f/f866dab696594e2ba25710a3b690c1b5 [2021-11-13 01:34:10,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:10,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:10,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:10,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:10,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:10,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:10" (1/1) ... [2021-11-13 01:34:11,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25481381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:11, skipping insertion in model container [2021-11-13 01:34:11,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:10" (1/1) ... [2021-11-13 01:34:11,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:11,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:11,758 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-13 01:34:11,964 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-13 01:34:11,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:11,993 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:34:11,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3439f069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:11, skipping insertion in model container [2021-11-13 01:34:11,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:11,996 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:34:11,999 INFO L158 Benchmark]: Toolchain (without parser) took 1005.72ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 73.9MB in the beginning and 106.4MB in the end (delta: -32.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:34:12,001 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 104.9MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:34:12,003 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1002.45ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 73.6MB in the beginning and 106.4MB in the end (delta: -32.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:34:12,004 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 104.9MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1002.45ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 73.6MB in the beginning and 106.4MB in the end (delta: -32.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: 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_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/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_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/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_90c008e1-ba1f-4dbc-930f-a75055436b61/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 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:14,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:14,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:14,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:14,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:14,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:14,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:14,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:14,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:14,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:14,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:14,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:14,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:14,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:14,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:14,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:14,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:14,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:14,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:14,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:14,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:14,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:14,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:14,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:14,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:14,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:14,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:14,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:14,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:14,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:14,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:14,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:14,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:14,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:14,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:14,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:14,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:14,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:14,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:14,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:14,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:14,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:34:14,496 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:14,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:14,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:14,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:14,498 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:14,498 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:14,498 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:14,498 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:14,499 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:14,499 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:14,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:14,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:34:14,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:34:14,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:14,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:14,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:14,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:14,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:14,502 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:34:14,502 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:34:14,502 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:34:14,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:14,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:14,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:14,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:14,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:34:14,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:14,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:14,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:14,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:14,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:14,505 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:34:14,505 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:14,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:14,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:14,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:14,506 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_90c008e1-ba1f-4dbc-930f-a75055436b61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 [2021-11-13 01:34:14,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:14,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:14,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:14,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:14,911 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:14,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-13 01:34:14,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/24d99c413/a8f3438c9a584388bbe6d361505f13ba/FLAG967fa9899 [2021-11-13 01:34:15,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:15,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-13 01:34:15,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/24d99c413/a8f3438c9a584388bbe6d361505f13ba/FLAG967fa9899 [2021-11-13 01:34:15,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/data/24d99c413/a8f3438c9a584388bbe6d361505f13ba [2021-11-13 01:34:15,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:15,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:15,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:15,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:15,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:15,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:15" (1/1) ... [2021-11-13 01:34:15,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7984f1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:15, skipping insertion in model container [2021-11-13 01:34:15,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:15" (1/1) ... [2021-11-13 01:34:15,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:16,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:16,490 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-13 01:34:16,591 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-13 01:34:16,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:16,611 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:34:16,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:16,675 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-13 01:34:16,820 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-13 01:34:16,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:16,835 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:34:16,886 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-13 01:34:16,982 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_90c008e1-ba1f-4dbc-930f-a75055436b61/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-13 01:34:17,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:17,071 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:34:17,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17 WrapperNode [2021-11-13 01:34:17,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:17,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:17,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:34:17,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:34:17,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:17,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:34:17,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:34:17,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:34:17,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:34:17,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:34:17,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:34:17,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:34:17,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (1/1) ... [2021-11-13 01:34:17,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:17,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:34:17,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:34:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:34:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:34:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 01:34:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 01:34:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:34:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 01:34:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:34:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:34:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:34:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:34:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:34:17,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:34:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:34:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:34:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:34:17,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:34:23,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:34:23,948 INFO L299 CfgBuilder]: Removed 54 assume(true) statements. [2021-11-13 01:34:23,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:23 BoogieIcfgContainer [2021-11-13 01:34:23,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:34:23,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:34:23,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:34:23,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:34:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:34:15" (1/3) ... [2021-11-13 01:34:23,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f8dc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:23, skipping insertion in model container [2021-11-13 01:34:23,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:17" (2/3) ... [2021-11-13 01:34:23,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f8dc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:23, skipping insertion in model container [2021-11-13 01:34:23,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:23" (3/3) ... [2021-11-13 01:34:23,958 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-1.i [2021-11-13 01:34:23,964 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:34:23,964 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 01:34:24,015 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:34:24,022 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:34:24,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 01:34:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 164 states have (on average 1.6890243902439024) internal successors, (277), 171 states have internal predecessors, (277), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 01:34:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 01:34:24,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:24,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:24,051 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-11-13 01:34:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:24,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323274577] [2021-11-13 01:34:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:24,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:24,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:24,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:34:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:34:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:24,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:24,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:24,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323274577] [2021-11-13 01:34:24,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323274577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:24,380 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:24,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:34:24,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102967965] [2021-11-13 01:34:24,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:34:24,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:34:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:34:24,423 INFO L87 Difference]: Start difference. First operand has 177 states, 164 states have (on average 1.6890243902439024) internal successors, (277), 171 states have internal predecessors, (277), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) 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) [2021-11-13 01:34:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:24,468 INFO L93 Difference]: Finished difference Result 352 states and 589 transitions. [2021-11-13 01:34:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:34:24,471 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 [2021-11-13 01:34:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:24,483 INFO L225 Difference]: With dead ends: 352 [2021-11-13 01:34:24,488 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 01:34:24,493 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 [2021-11-13 01:34:24,500 INFO L933 BasicCegarLoop]: 233 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, 233 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:24,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:34:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 01:34:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-13 01:34:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 167 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 01:34:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-11-13 01:34:24,584 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-11-13 01:34:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-11-13 01:34:24,585 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) [2021-11-13 01:34:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-11-13 01:34:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 01:34:24,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:24,590 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] [2021-11-13 01:34:24,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:24,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:24,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-11-13 01:34:24,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:24,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985911428] [2021-11-13 01:34:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:24,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:24,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:24,810 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:24,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:34:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:25,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:25,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:25,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985911428] [2021-11-13 01:34:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985911428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:25,623 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:25,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 01:34:25,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318225160] [2021-11-13 01:34:25,624 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:25,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:34:25,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:25,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:34:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:25,628 INFO L87 Difference]: Start difference. First operand 173 states and 229 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) [2021-11-13 01:34:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:25,892 INFO L93 Difference]: Finished difference Result 260 states and 347 transitions. [2021-11-13 01:34:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:25,893 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 [2021-11-13 01:34:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:25,901 INFO L225 Difference]: With dead ends: 260 [2021-11-13 01:34:25,903 INFO L226 Difference]: Without dead ends: 182 [2021-11-13 01:34:25,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:25,907 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 70 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.09ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.36ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:25,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1043 Invalid, 98 Unknown, 0 Unchecked, 8.09ms Time], IncrementalHoareTripleChecker [25 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 227.36ms Time] [2021-11-13 01:34:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-13 01:34:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2021-11-13 01:34:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.2682926829268293) internal successors, (208), 170 states have internal predecessors, (208), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 01:34:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 224 transitions. [2021-11-13 01:34:25,947 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 224 transitions. Word has length 44 [2021-11-13 01:34:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 224 transitions. [2021-11-13 01:34:25,948 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) [2021-11-13 01:34:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 224 transitions. [2021-11-13 01:34:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 01:34:25,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:25,954 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] [2021-11-13 01:34:25,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 01:34:26,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:26,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1193469581, now seen corresponding path program 1 times [2021-11-13 01:34:26,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:26,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828548046] [2021-11-13 01:34:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:26,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:26,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:34:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:34:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:26,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:27,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:27,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828548046] [2021-11-13 01:34:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828548046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:27,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:27,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-13 01:34:27,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992690791] [2021-11-13 01:34:27,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:27,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:34:27,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:34:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:34:27,068 INFO L87 Difference]: Start difference. First operand 176 states and 224 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) [2021-11-13 01:34:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:27,232 INFO L93 Difference]: Finished difference Result 256 states and 324 transitions. [2021-11-13 01:34:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:27,233 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 [2021-11-13 01:34:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:27,236 INFO L225 Difference]: With dead ends: 256 [2021-11-13 01:34:27,236 INFO L226 Difference]: Without dead ends: 175 [2021-11-13 01:34:27,237 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 [2021-11-13 01:34:27,239 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 121 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.36ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:27,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 713 Invalid, 85 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 141.36ms Time] [2021-11-13 01:34:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-13 01:34:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2021-11-13 01:34:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.2531645569620253) internal successors, (198), 164 states have internal predecessors, (198), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 01:34:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2021-11-13 01:34:27,257 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 44 [2021-11-13 01:34:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:27,258 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2021-11-13 01:34:27,258 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) [2021-11-13 01:34:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2021-11-13 01:34:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 01:34:27,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:27,261 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] [2021-11-13 01:34:27,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:27,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:27,478 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -440517769, now seen corresponding path program 1 times [2021-11-13 01:34:27,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:27,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229807037] [2021-11-13 01:34:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:27,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:27,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:27,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:27,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:34:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:27,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:27,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:27,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:27,893 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-13 01:34:27,894 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 [2021-11-13 01:34:27,991 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 01:34:27,991 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 [2021-11-13 01:34:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:28,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:28,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:28,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229807037] [2021-11-13 01:34:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229807037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:28,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:28,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:34:28,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536305679] [2021-11-13 01:34:28,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:28,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:28,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:28,361 INFO L87 Difference]: Start difference. First operand 170 states and 214 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) [2021-11-13 01:34:33,750 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 [] [2021-11-13 01:34:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:35,647 INFO L93 Difference]: Finished difference Result 423 states and 530 transitions. [2021-11-13 01:34:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:35,649 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 [2021-11-13 01:34:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:35,652 INFO L225 Difference]: With dead ends: 423 [2021-11-13 01:34:35,652 INFO L226 Difference]: Without dead ends: 347 [2021-11-13 01:34:35,653 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 [2021-11-13 01:34:35,654 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 321 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7000.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.05ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7204.12ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:35,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 793 Invalid, 184 Unknown, 0 Unchecked, 8.05ms Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 7204.12ms Time] [2021-11-13 01:34:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-13 01:34:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 172. [2021-11-13 01:34:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.25) internal successors, (200), 166 states have internal predecessors, (200), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 01:34:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2021-11-13 01:34:35,692 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 44 [2021-11-13 01:34:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:35,692 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2021-11-13 01:34:35,693 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) [2021-11-13 01:34:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2021-11-13 01:34:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 01:34:35,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:35,697 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] [2021-11-13 01:34:35,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:35,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:35,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1362911587, now seen corresponding path program 1 times [2021-11-13 01:34:35,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:35,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102198127] [2021-11-13 01:34:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:35,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:35,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:35,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:35,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:34:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:36,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:36,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:36,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102198127] [2021-11-13 01:34:36,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102198127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:36,740 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:36,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:34:36,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708461316] [2021-11-13 01:34:36,740 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:36,742 INFO L87 Difference]: Start difference. First operand 172 states and 216 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) [2021-11-13 01:34:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:36,880 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2021-11-13 01:34:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:36,881 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 [2021-11-13 01:34:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:36,883 INFO L225 Difference]: With dead ends: 349 [2021-11-13 01:34:36,883 INFO L226 Difference]: Without dead ends: 181 [2021-11-13 01:34:36,884 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 [2021-11-13 01:34:36,885 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 174 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.01ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:36,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 421 Invalid, 69 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 113.01ms Time] [2021-11-13 01:34:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-13 01:34:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-11-13 01:34:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.196319018404908) internal successors, (195), 169 states have internal predecessors, (195), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 01:34:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-13 01:34:36,899 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 96 [2021-11-13 01:34:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:36,899 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-13 01:34:36,900 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) [2021-11-13 01:34:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-13 01:34:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 01:34:36,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:36,902 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] [2021-11-13 01:34:36,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:37,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:37,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-11-13 01:34:37,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:37,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691085226] [2021-11-13 01:34:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:37,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:37,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:34:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:37,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:38,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:38,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691085226] [2021-11-13 01:34:38,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691085226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:38,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1539155503] [2021-11-13 01:34:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:38,253 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:38,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:38,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 01:34:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:38,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:38,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:39,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:39,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1539155503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:39,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:39,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4] total 5 [2021-11-13 01:34:39,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886885392] [2021-11-13 01:34:39,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:39,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:39,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:39,744 INFO L87 Difference]: Start difference. First operand 175 states and 211 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) [2021-11-13 01:34:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:40,373 INFO L93 Difference]: Finished difference Result 480 states and 581 transitions. [2021-11-13 01:34:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:40,374 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 [2021-11-13 01:34:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:40,377 INFO L225 Difference]: With dead ends: 480 [2021-11-13 01:34:40,377 INFO L226 Difference]: Without dead ends: 309 [2021-11-13 01:34:40,378 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 [2021-11-13 01:34:40,379 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 114 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 574.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 607.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:40,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 410 Invalid, 19 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 607.05ms Time] [2021-11-13 01:34:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-13 01:34:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2021-11-13 01:34:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 289 states have (on average 1.1868512110726643) internal successors, (343), 300 states have internal predecessors, (343), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-13 01:34:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 371 transitions. [2021-11-13 01:34:40,401 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 371 transitions. Word has length 96 [2021-11-13 01:34:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:40,402 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 371 transitions. [2021-11-13 01:34:40,402 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) [2021-11-13 01:34:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 371 transitions. [2021-11-13 01:34:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 01:34:40,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:40,406 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] [2021-11-13 01:34:40,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:40,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:40,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:40,825 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -824366783, now seen corresponding path program 1 times [2021-11-13 01:34:40,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:40,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476458710] [2021-11-13 01:34:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:40,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:40,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:40,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:34:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:41,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:41,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:42,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:42,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476458710] [2021-11-13 01:34:42,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476458710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:42,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:42,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:34:42,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254150719] [2021-11-13 01:34:42,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:42,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:42,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:42,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:34:42,722 INFO L87 Difference]: Start difference. First operand 307 states and 371 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) [2021-11-13 01:34:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:43,240 INFO L93 Difference]: Finished difference Result 547 states and 648 transitions. [2021-11-13 01:34:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:43,241 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 [2021-11-13 01:34:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:43,244 INFO L225 Difference]: With dead ends: 547 [2021-11-13 01:34:43,244 INFO L226 Difference]: Without dead ends: 385 [2021-11-13 01:34:43,245 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 [2021-11-13 01:34:43,246 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 29 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 463.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 495.51ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:43,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 422 Invalid, 16 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 495.51ms Time] [2021-11-13 01:34:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-13 01:34:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2021-11-13 01:34:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 365 states have (on average 1.158904109589041) internal successors, (423), 376 states have internal predecessors, (423), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-13 01:34:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 451 transitions. [2021-11-13 01:34:43,271 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 451 transitions. Word has length 103 [2021-11-13 01:34:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:43,272 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 451 transitions. [2021-11-13 01:34:43,272 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) [2021-11-13 01:34:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 451 transitions. [2021-11-13 01:34:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:43,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:43,274 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] [2021-11-13 01:34:43,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:43,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:43,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1015837155, now seen corresponding path program 1 times [2021-11-13 01:34:43,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:43,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765530239] [2021-11-13 01:34:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:43,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:43,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:43,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:43,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:34:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:44,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:34:44,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:44,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765530239] [2021-11-13 01:34:44,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765530239] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:44,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:34:44,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:34:44,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505793938] [2021-11-13 01:34:44,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:44,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:44,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:44,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:44,397 INFO L87 Difference]: Start difference. First operand 383 states and 451 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) [2021-11-13 01:34:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:44,470 INFO L93 Difference]: Finished difference Result 724 states and 860 transitions. [2021-11-13 01:34:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:44,471 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 [2021-11-13 01:34:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:44,476 INFO L225 Difference]: With dead ends: 724 [2021-11-13 01:34:44,477 INFO L226 Difference]: Without dead ends: 386 [2021-11-13 01:34:44,478 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 [2021-11-13 01:34:44,479 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.03ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:44,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 596 Invalid, 13 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 35.03ms Time] [2021-11-13 01:34:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-13 01:34:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-13 01:34:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 367 states have (on average 1.1607629427792916) internal successors, (426), 379 states have internal predecessors, (426), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (16), 6 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-13 01:34:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 456 transitions. [2021-11-13 01:34:44,513 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 456 transitions. Word has length 111 [2021-11-13 01:34:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 456 transitions. [2021-11-13 01:34:44,514 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) [2021-11-13 01:34:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 456 transitions. [2021-11-13 01:34:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:34:44,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:44,516 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] [2021-11-13 01:34:44,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:44,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:44,732 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1408576837, now seen corresponding path program 1 times [2021-11-13 01:34:44,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:44,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268551817] [2021-11-13 01:34:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:44,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:44,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:44,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:34:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:34:45,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:45,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:45,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268551817] [2021-11-13 01:34:45,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268551817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:45,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [272280681] [2021-11-13 01:34:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:45,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:45,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:45,728 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:45,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 01:34:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:34:46,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:34:46,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [272280681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:46,876 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:46,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-13 01:34:46,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543012709] [2021-11-13 01:34:46,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:46,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:46,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:34:46,878 INFO L87 Difference]: Start difference. First operand 386 states and 456 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) [2021-11-13 01:34:49,284 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 [] [2021-11-13 01:34:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:51,391 INFO L93 Difference]: Finished difference Result 676 states and 801 transitions. [2021-11-13 01:34:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:51,392 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 [2021-11-13 01:34:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:51,395 INFO L225 Difference]: With dead ends: 676 [2021-11-13 01:34:51,396 INFO L226 Difference]: Without dead ends: 335 [2021-11-13 01:34:51,397 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 [2021-11-13 01:34:51,397 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4344.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4454.74ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:51,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 279 Invalid, 63 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 4454.74ms Time] [2021-11-13 01:34:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-13 01:34:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 219. [2021-11-13 01:34:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1699029126213591) internal successors, (241), 213 states have internal predecessors, (241), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 01:34:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2021-11-13 01:34:51,414 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 113 [2021-11-13 01:34:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:51,414 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2021-11-13 01:34:51,415 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) [2021-11-13 01:34:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2021-11-13 01:34:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 01:34:51,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:51,417 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] [2021-11-13 01:34:51,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:51,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-13 01:34:51,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:51,827 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1827414795, now seen corresponding path program 1 times [2021-11-13 01:34:51,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:51,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549910762] [2021-11-13 01:34:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:51,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:51,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:51,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:51,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:34:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:34:52,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:52,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:52,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549910762] [2021-11-13 01:34:52,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549910762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:52,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1943380791] [2021-11-13 01:34:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:52,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:52,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:52,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:52,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 01:34:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:34:53,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1943380791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:53,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377963023] [2021-11-13 01:34:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:53,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:53,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:53,620 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:53,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 01:34:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:54,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:34:54,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377963023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:54,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:34:54,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-13 01:34:54,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431558378] [2021-11-13 01:34:54,433 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:34:54,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:34:54,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:54,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:34:54,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:34:54,435 INFO L87 Difference]: Start difference. First operand 219 states and 258 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) [2021-11-13 01:34:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:54,916 INFO L93 Difference]: Finished difference Result 405 states and 489 transitions. [2021-11-13 01:34:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 01:34:54,917 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 [2021-11-13 01:34:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:54,919 INFO L225 Difference]: With dead ends: 405 [2021-11-13 01:34:54,919 INFO L226 Difference]: Without dead ends: 234 [2021-11-13 01:34:54,920 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 [2021-11-13 01:34:54,921 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 42 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.65ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:54,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1365 Invalid, 109 Unknown, 0 Unchecked, 6.65ms Time], IncrementalHoareTripleChecker [34 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 217.05ms Time] [2021-11-13 01:34:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-13 01:34:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2021-11-13 01:34:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 216 states have (on average 1.1990740740740742) internal successors, (259), 223 states have internal predecessors, (259), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 01:34:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 276 transitions. [2021-11-13 01:34:54,946 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 276 transitions. Word has length 120 [2021-11-13 01:34:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:54,946 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 276 transitions. [2021-11-13 01:34:54,947 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) [2021-11-13 01:34:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 276 transitions. [2021-11-13 01:34:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 01:34:54,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:54,949 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] [2021-11-13 01:34:54,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:55,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:55,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 01:34:55,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:55,556 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash 852458707, now seen corresponding path program 2 times [2021-11-13 01:34:55,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:55,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653371942] [2021-11-13 01:34:55,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:34:55,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:55,561 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:34:56,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:34:56,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:34:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:34:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:34:56,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:56,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:56,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653371942] [2021-11-13 01:34:56,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653371942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:56,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245347044] [2021-11-13 01:34:56,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:34:56,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:56,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:56,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:56,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-13 01:34:57,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:34:57,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:34:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:34:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:34:57,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:58,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245347044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:58,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309961731] [2021-11-13 01:34:58,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:34:58,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:58,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:58,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 01:34:58,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:34:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:34:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:34:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:34:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:59,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309961731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:59,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:34:59,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-13 01:34:59,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914699204] [2021-11-13 01:34:59,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:34:59,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 01:34:59,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 01:34:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:34:59,292 INFO L87 Difference]: Start difference. First operand 230 states and 276 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) [2021-11-13 01:35:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:00,502 INFO L93 Difference]: Finished difference Result 423 states and 514 transitions. [2021-11-13 01:35:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 01:35:00,503 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 [2021-11-13 01:35:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:00,505 INFO L225 Difference]: With dead ends: 423 [2021-11-13 01:35:00,506 INFO L226 Difference]: Without dead ends: 243 [2021-11-13 01:35:00,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 01:35:00,509 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 60 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 414.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.10ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 484.10ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:00,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1590 Invalid, 240 Unknown, 0 Unchecked, 10.10ms Time], IncrementalHoareTripleChecker [42 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 484.10ms Time] [2021-11-13 01:35:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-13 01:35:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-11-13 01:35:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 223 states have (on average 1.1928251121076232) internal successors, (266), 230 states have internal predecessors, (266), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 01:35:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2021-11-13 01:35:00,526 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 126 [2021-11-13 01:35:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:00,527 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2021-11-13 01:35:00,527 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) [2021-11-13 01:35:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2021-11-13 01:35:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 01:35:00,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:00,529 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] [2021-11-13 01:35:00,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:00,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:00,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:01,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:01,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 453394239, now seen corresponding path program 3 times [2021-11-13 01:35:01,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:01,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67457113] [2021-11-13 01:35:01,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:35:01,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:01,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:01,147 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:01,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:35:07,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 01:35:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:35:07,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:35:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 01:35:07,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 01:35:08,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:08,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67457113] [2021-11-13 01:35:08,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67457113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:08,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2106356093] [2021-11-13 01:35:08,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:35:08,062 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:08,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:08,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 01:35:22,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 01:35:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:35:22,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:35:22,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 01:35:22,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 01:35:22,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2106356093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:22,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302375641] [2021-11-13 01:35:22,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:35:22,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:22,604 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:35:22,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c008e1-ba1f-4dbc-930f-a75055436b61/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process