./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/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_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/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_87c4ad65-bf27-49d2-8251-94bc45f2922f/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 1fe25077175322d8d5e3cefee67a534dcd61077607911040f354db1679589b09 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:25,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:25,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:25,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:25,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:25,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:25,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:25,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:25,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:25,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:25,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:25,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:25,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:25,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:25,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:26,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:26,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:26,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:26,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:26,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:26,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:26,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:26,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:26,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:26,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:26,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:26,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:26,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:26,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:26,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:26,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:26,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:26,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:26,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:26,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:26,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:26,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:26,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:26,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:26,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:26,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:26,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:52:26,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:26,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:26,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:26,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:26,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:26,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:26,065 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:26,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:52:26,066 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:26,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:26,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:52:26,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:52:26,068 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:26,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:52:26,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:52:26,068 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:52:26,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:26,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:26,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:52:26,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:26,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:26,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:26,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:26,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:26,071 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:26,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:26,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:26,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:26,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:26,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:26,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:26,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:26,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:26,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:26,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:26,075 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:52:26,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:52:26,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:26,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:26,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:26,077 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe25077175322d8d5e3cefee67a534dcd61077607911040f354db1679589b09 [2021-11-12 22:52:26,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:26,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:26,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:26,452 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:26,453 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:26,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i [2021-11-12 22:52:26,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/398608d2e/f4ef5072658b4f9b82603a0b41ecec9b/FLAG2148d50b3 [2021-11-12 22:52:27,265 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:27,266 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i [2021-11-12 22:52:27,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/398608d2e/f4ef5072658b4f9b82603a0b41ecec9b/FLAG2148d50b3 [2021-11-12 22:52:27,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/398608d2e/f4ef5072658b4f9b82603a0b41ecec9b [2021-11-12 22:52:27,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:27,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:27,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:27,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:27,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:27,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199812a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27, skipping insertion in model container [2021-11-12 22:52:27,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:27,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:28,146 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[33021,33034] [2021-11-12 22:52:28,373 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[49681,49694] [2021-11-12 22:52:28,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:28,413 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:52:28,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@cfb5fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:28, skipping insertion in model container [2021-11-12 22:52:28,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:28,414 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:52:28,417 INFO L158 Benchmark]: Toolchain (without parser) took 974.15ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 54.0MB in the beginning and 94.5MB in the end (delta: -40.6MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-12 22:52:28,418 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory was 62.0MB in the beginning and 62.0MB in the end (delta: 28.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:52:28,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 971.53ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 53.7MB in the beginning and 94.5MB in the end (delta: -40.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-12 22:52:28,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 90.2MB. Free memory was 62.0MB in the beginning and 62.0MB in the end (delta: 28.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 971.53ms. Allocated memory was 90.2MB in the beginning and 132.1MB in the end (delta: 41.9MB). Free memory was 53.7MB in the beginning and 94.5MB in the end (delta: -40.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/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_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/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_87c4ad65-bf27-49d2-8251-94bc45f2922f/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 1fe25077175322d8d5e3cefee67a534dcd61077607911040f354db1679589b09 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:30,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:30,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:30,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:30,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:30,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:30,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:30,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:30,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:30,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:30,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:30,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:30,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:30,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:30,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:30,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:30,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:30,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:30,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:30,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:30,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:30,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:30,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:30,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:30,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:30,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:30,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:30,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:30,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:30,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:30,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:30,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:30,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:30,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:30,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:30,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:30,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:30,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:30,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:30,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:30,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:30,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:52:30,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:30,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:30,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:30,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:30,824 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:30,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:30,824 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:30,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:30,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:30,825 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:30,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:30,828 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:30,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:30,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:30,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:30,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:30,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:30,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:30,830 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:52:30,830 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:52:30,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:30,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:30,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:30,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:30,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:30,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:52:30,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:30,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:30,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:30,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:30,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:30,833 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:52:30,833 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:30,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:30,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:30,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:30,834 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe25077175322d8d5e3cefee67a534dcd61077607911040f354db1679589b09 [2021-11-12 22:52:31,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:31,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:31,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:31,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:31,329 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:31,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i [2021-11-12 22:52:31,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/901fabe17/979140530f2946879d5619370d79cbf7/FLAG9f865eba1 [2021-11-12 22:52:32,147 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:32,147 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i [2021-11-12 22:52:32,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/901fabe17/979140530f2946879d5619370d79cbf7/FLAG9f865eba1 [2021-11-12 22:52:32,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/data/901fabe17/979140530f2946879d5619370d79cbf7 [2021-11-12 22:52:32,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:32,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:32,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:32,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:32,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:32,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:32" (1/1) ... [2021-11-12 22:52:32,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@615281c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:32, skipping insertion in model container [2021-11-12 22:52:32,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:32" (1/1) ... [2021-11-12 22:52:32,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:32,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:32,995 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[33021,33034] [2021-11-12 22:52:33,192 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[49681,49694] [2021-11-12 22:52:33,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:33,223 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:52:33,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:33,272 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[33021,33034] [2021-11-12 22:52:33,367 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[49681,49694] [2021-11-12 22:52:33,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:33,392 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:52:33,433 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[33021,33034] [2021-11-12 22:52:33,515 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_87c4ad65-bf27-49d2-8251-94bc45f2922f/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-2.i[49681,49694] [2021-11-12 22:52:33,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:33,575 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:52:33,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33 WrapperNode [2021-11-12 22:52:33,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:33,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:33,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:52:33,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:52:33,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:33,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:52:33,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:52:33,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:52:33,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:52:33,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:52:33,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:52:33,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:52:33,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:34,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:34,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:34,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:52:34,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:52:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:52:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:52:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:52:34,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:52:34,089 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:52:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:52:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:52:34,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:52:44,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:52:44,281 INFO L299 CfgBuilder]: Removed 92 assume(true) statements. [2021-11-12 22:52:44,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:44 BoogieIcfgContainer [2021-11-12 22:52:44,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:52:44,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:52:44,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:52:44,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:52:44,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:52:32" (1/3) ... [2021-11-12 22:52:44,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b83d418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:44, skipping insertion in model container [2021-11-12 22:52:44,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (2/3) ... [2021-11-12 22:52:44,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b83d418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:44, skipping insertion in model container [2021-11-12 22:52:44,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:44" (3/3) ... [2021-11-12 22:52:44,291 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test5-2.i [2021-11-12 22:52:44,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:52:44,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:52:44,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:52:44,352 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:52:44,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:52:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 22:52:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:52:44,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:44,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:44,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-12 22:52:44,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:44,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404540177] [2021-11-12 22:52:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:44,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:44,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:44,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:44,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:52:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:52:44,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:44,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:44,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:44,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404540177] [2021-11-12 22:52:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404540177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:44,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:44,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:52:44,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702536932] [2021-11-12 22:52:44,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:44,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:52:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:52:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:44,712 INFO L87 Difference]: Start difference. First operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:44,775 INFO L93 Difference]: Finished difference Result 572 states and 967 transitions. [2021-11-12 22:52:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:52:44,778 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 22:52:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:44,791 INFO L225 Difference]: With dead ends: 572 [2021-11-12 22:52:44,791 INFO L226 Difference]: Without dead ends: 254 [2021-11-12 22:52:44,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:44,800 INFO L933 BasicCegarLoop]: 381 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, 381 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:44,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 4.54ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:52:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-12 22:52:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-12 22:52:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 22:52:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-12 22:52:44,894 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-12 22:52:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:44,895 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-12 22:52:44,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-12 22:52:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:52:44,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:44,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:44,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:45,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:45,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-12 22:52:45,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:45,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096745012] [2021-11-12 22:52:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:45,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:45,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:45,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:45,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:52:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:45,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:45,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:45,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096745012] [2021-11-12 22:52:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096745012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:45,609 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:45,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:52:45,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249970703] [2021-11-12 22:52:45,610 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:45,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:45,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:45,613 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:46,068 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-12 22:52:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-12 22:52:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:46,075 INFO L225 Difference]: With dead ends: 575 [2021-11-12 22:52:46,075 INFO L226 Difference]: Without dead ends: 497 [2021-11-12 22:52:46,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:46,078 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 600 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 336.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.38ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 378.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:46,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 719 Invalid, 30 Unknown, 0 Unchecked, 11.38ms Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 378.18ms Time] [2021-11-12 22:52:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-12 22:52:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-12 22:52:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 22:52:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-12 22:52:46,131 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-12 22:52:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:46,131 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-12 22:52:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-12 22:52:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 22:52:46,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:46,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:46,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:46,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:46,367 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-12 22:52:46,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:46,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384225653] [2021-11-12 22:52:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:46,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:46,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:46,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:52:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:47,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:52:47,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:52:48,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:48,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384225653] [2021-11-12 22:52:48,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384225653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:48,352 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:48,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:52:48,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213458733] [2021-11-12 22:52:48,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:48,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:48,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:48,355 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:48,494 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-12 22:52:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-12 22:52:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:48,503 INFO L225 Difference]: With dead ends: 850 [2021-11-12 22:52:48,503 INFO L226 Difference]: Without dead ends: 433 [2021-11-12 22:52:48,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:48,514 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.87ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:48,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 4.87ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 95.28ms Time] [2021-11-12 22:52:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-12 22:52:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-12 22:52:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 22:52:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-12 22:52:48,602 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-12 22:52:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:48,604 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-12 22:52:48,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-12 22:52:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 22:52:48,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:48,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:48,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:48,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-12 22:52:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:48,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382561894] [2021-11-12 22:52:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:48,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:48,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:48,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:52:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:52:50,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:52:51,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:51,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382561894] [2021-11-12 22:52:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382561894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:51,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:51,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:52:51,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855696339] [2021-11-12 22:52:51,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:51,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:52:51,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:52:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:52:51,095 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:51,632 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-12 22:52:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-12 22:52:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:51,646 INFO L225 Difference]: With dead ends: 807 [2021-11-12 22:52:51,646 INFO L226 Difference]: Without dead ends: 429 [2021-11-12 22:52:51,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:52:51,648 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 505.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 515.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:51,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 515.41ms Time] [2021-11-12 22:52:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-12 22:52:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-12 22:52:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 22:52:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-12 22:52:51,673 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-12 22:52:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:51,674 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-12 22:52:51,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-12 22:52:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-12 22:52:51,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:51,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:51,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 22:52:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,895 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash 350641186, now seen corresponding path program 1 times [2021-11-12 22:52:51,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:51,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908841575] [2021-11-12 22:52:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:51,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:51,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:51,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:52:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 22:52:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:52:53,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:53,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908841575] [2021-11-12 22:52:53,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908841575] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:53,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:53,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:53,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708461991] [2021-11-12 22:52:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:53,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:53,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:53,715 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:53,802 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-12 22:52:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-12 22:52:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:53,807 INFO L225 Difference]: With dead ends: 814 [2021-11-12 22:52:53,807 INFO L226 Difference]: Without dead ends: 432 [2021-11-12 22:52:53,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:53,810 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:53,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 55.57ms Time] [2021-11-12 22:52:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-12 22:52:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-12 22:52:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-12 22:52:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-12 22:52:53,834 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-12 22:52:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:53,835 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-12 22:52:53,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-12 22:52:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-12 22:52:53,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:53,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:53,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:54,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:54,058 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 998930052, now seen corresponding path program 1 times [2021-11-12 22:52:54,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:54,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932416447] [2021-11-12 22:52:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:54,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:54,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:54,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:54,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:52:55,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:52:55,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:55,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932416447] [2021-11-12 22:52:55,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932416447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:55,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991962320] [2021-11-12 22:52:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:55,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:55,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:52:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:52:56,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:52:56,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:52:57,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991962320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:57,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:57,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-12 22:52:57,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33706574] [2021-11-12 22:52:57,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:57,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:52:57,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:52:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:52:57,839 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:58,068 INFO L93 Difference]: Finished difference Result 810 states and 1058 transitions. [2021-11-12 22:52:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-12 22:52:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:58,073 INFO L225 Difference]: With dead ends: 810 [2021-11-12 22:52:58,074 INFO L226 Difference]: Without dead ends: 478 [2021-11-12 22:52:58,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:52:58,076 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 41 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.85ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:58,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 878 Invalid, 151 Unknown, 0 Unchecked, 3.85ms Time], IncrementalHoareTripleChecker [76 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 202.91ms Time] [2021-11-12 22:52:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-12 22:52:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 472. [2021-11-12 22:52:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 450 states have (on average 1.24) internal successors, (558), 457 states have internal predecessors, (558), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-12 22:52:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 596 transitions. [2021-11-12 22:52:58,099 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 596 transitions. Word has length 255 [2021-11-12 22:52:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:58,100 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 596 transitions. [2021-11-12 22:52:58,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 596 transitions. [2021-11-12 22:52:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-12 22:52:58,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:58,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:58,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:58,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:58,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:58,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2108414208, now seen corresponding path program 1 times [2021-11-12 22:52:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:58,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526672677] [2021-11-12 22:52:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:58,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:58,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:58,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:58,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:52:59,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:53:00,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:00,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526672677] [2021-11-12 22:53:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526672677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:00,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2133322273] [2021-11-12 22:53:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:00,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:00,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:53:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:01,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2133322273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:02,025 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:02,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:53:02,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047330363] [2021-11-12 22:53:02,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:02,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:02,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:02,028 INFO L87 Difference]: Start difference. First operand 472 states and 596 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:02,682 INFO L93 Difference]: Finished difference Result 1026 states and 1310 transitions. [2021-11-12 22:53:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:02,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-12 22:53:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:02,689 INFO L225 Difference]: With dead ends: 1026 [2021-11-12 22:53:02,689 INFO L226 Difference]: Without dead ends: 748 [2021-11-12 22:53:02,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:02,692 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 233 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 584.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.00ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 613.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:02,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 765 Invalid, 19 Unknown, 0 Unchecked, 3.00ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 613.31ms Time] [2021-11-12 22:53:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-12 22:53:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-11-12 22:53:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 714 states have (on average 1.2478991596638656) internal successors, (891), 726 states have internal predecessors, (891), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-12 22:53:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 952 transitions. [2021-11-12 22:53:02,730 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 952 transitions. Word has length 255 [2021-11-12 22:53:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:02,731 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 952 transitions. [2021-11-12 22:53:02,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 952 transitions. [2021-11-12 22:53:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-12 22:53:02,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:02,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:02,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:02,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:03,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:03,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:03,150 INFO L85 PathProgramCache]: Analyzing trace with hash -105934868, now seen corresponding path program 1 times [2021-11-12 22:53:03,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:03,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927473166] [2021-11-12 22:53:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:03,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:03,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:03,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:53:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:53:04,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:53:04,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:04,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927473166] [2021-11-12 22:53:04,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927473166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:04,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728775995] [2021-11-12 22:53:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:04,843 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:04,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:04,843 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:04,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:53:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:53:07,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:53:08,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [728775995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:08,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:08,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:53:08,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384347364] [2021-11-12 22:53:08,724 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:08,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:08,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:08,726 INFO L87 Difference]: Start difference. First operand 746 states and 952 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:09,182 INFO L93 Difference]: Finished difference Result 1054 states and 1345 transitions. [2021-11-12 22:53:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-12 22:53:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:09,187 INFO L225 Difference]: With dead ends: 1054 [2021-11-12 22:53:09,188 INFO L226 Difference]: Without dead ends: 745 [2021-11-12 22:53:09,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:09,189 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 93 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 410.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:09,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 432.28ms Time] [2021-11-12 22:53:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-12 22:53:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-11-12 22:53:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 712 states have (on average 1.2485955056179776) internal successors, (889), 724 states have internal predecessors, (889), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 22:53:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 947 transitions. [2021-11-12 22:53:09,225 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 947 transitions. Word has length 262 [2021-11-12 22:53:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:09,225 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 947 transitions. [2021-11-12 22:53:09,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 947 transitions. [2021-11-12 22:53:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 22:53:09,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:09,231 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:09,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:09,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:09,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:09,647 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2036261227, now seen corresponding path program 1 times [2021-11-12 22:53:09,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:09,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89733724] [2021-11-12 22:53:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:09,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:09,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:09,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:53:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:10,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:53:11,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:11,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89733724] [2021-11-12 22:53:11,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89733724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:11,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1064837642] [2021-11-12 22:53:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:11,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:11,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:11,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:53:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 22:53:12,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 22:53:12,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1064837642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:12,878 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:12,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-12 22:53:12,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579236503] [2021-11-12 22:53:12,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:12,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:53:12,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:53:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:12,880 INFO L87 Difference]: Start difference. First operand 743 states and 947 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:53:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:13,045 INFO L93 Difference]: Finished difference Result 961 states and 1255 transitions. [2021-11-12 22:53:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-12 22:53:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:13,051 INFO L225 Difference]: With dead ends: 961 [2021-11-12 22:53:13,052 INFO L226 Difference]: Without dead ends: 806 [2021-11-12 22:53:13,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:13,053 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 19 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:13,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 593 Invalid, 98 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [50 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 142.52ms Time] [2021-11-12 22:53:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-12 22:53:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 803. [2021-11-12 22:53:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 772 states have (on average 1.2292746113989637) internal successors, (949), 784 states have internal predecessors, (949), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 22:53:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1007 transitions. [2021-11-12 22:53:13,093 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1007 transitions. Word has length 279 [2021-11-12 22:53:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:13,094 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1007 transitions. [2021-11-12 22:53:13,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:53:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1007 transitions. [2021-11-12 22:53:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 22:53:13,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:13,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:13,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 22:53:13,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:13,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:13,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:13,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash 650057833, now seen corresponding path program 1 times [2021-11-12 22:53:13,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:13,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171045518] [2021-11-12 22:53:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:13,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:13,518 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:13,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:53:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:14,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:53:15,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:15,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171045518] [2021-11-12 22:53:15,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171045518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:15,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1082444242] [2021-11-12 22:53:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:15,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:15,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:15,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:53:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:53:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:53:16,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 22:53:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1082444242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:16,703 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:16,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-12 22:53:16,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954002842] [2021-11-12 22:53:16,704 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:53:16,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:53:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:16,706 INFO L87 Difference]: Start difference. First operand 803 states and 1007 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:53:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:16,943 INFO L93 Difference]: Finished difference Result 1466 states and 1855 transitions. [2021-11-12 22:53:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-12 22:53:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:16,949 INFO L225 Difference]: With dead ends: 1466 [2021-11-12 22:53:16,949 INFO L226 Difference]: Without dead ends: 755 [2021-11-12 22:53:16,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:16,952 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 272 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:16,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1778 Invalid, 111 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 197.35ms Time] [2021-11-12 22:53:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-12 22:53:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2021-11-12 22:53:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.1997226074895977) internal successors, (865), 733 states have internal predecessors, (865), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 22:53:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 923 transitions. [2021-11-12 22:53:16,988 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 923 transitions. Word has length 279 [2021-11-12 22:53:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:16,988 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 923 transitions. [2021-11-12 22:53:16,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:53:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 923 transitions. [2021-11-12 22:53:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 22:53:16,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:16,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:17,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:17,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:17,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:17,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash 920558569, now seen corresponding path program 1 times [2021-11-12 22:53:17,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:17,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967717799] [2021-11-12 22:53:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:17,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:17,408 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:17,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:53:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:18,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:53:19,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:19,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967717799] [2021-11-12 22:53:19,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967717799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:19,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [811093892] [2021-11-12 22:53:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:19,151 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:19,159 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:19,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:53:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 22:53:20,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-12 22:53:20,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [811093892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:20,393 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:20,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-12 22:53:20,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117061884] [2021-11-12 22:53:20,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:20,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:20,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:53:20,395 INFO L87 Difference]: Start difference. First operand 752 states and 923 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:53:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:20,549 INFO L93 Difference]: Finished difference Result 931 states and 1165 transitions. [2021-11-12 22:53:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-12 22:53:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:20,557 INFO L225 Difference]: With dead ends: 931 [2021-11-12 22:53:20,557 INFO L226 Difference]: Without dead ends: 708 [2021-11-12 22:53:20,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:20,559 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 150 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:20,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 788 Invalid, 77 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [39 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 91.60ms Time] [2021-11-12 22:53:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-12 22:53:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 701. [2021-11-12 22:53:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 670 states have (on average 1.1656716417910449) internal successors, (781), 682 states have internal predecessors, (781), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-12 22:53:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 839 transitions. [2021-11-12 22:53:20,598 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 839 transitions. Word has length 279 [2021-11-12 22:53:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:20,599 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 839 transitions. [2021-11-12 22:53:20,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:53:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 839 transitions. [2021-11-12 22:53:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-12 22:53:20,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:20,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:20,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:20,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:21,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:21,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1465605129, now seen corresponding path program 1 times [2021-11-12 22:53:21,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:21,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463270261] [2021-11-12 22:53:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:21,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:21,031 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:21,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:53:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:22,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:53:22,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:22,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463270261] [2021-11-12 22:53:22,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463270261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:22,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030058217] [2021-11-12 22:53:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:22,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:22,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:22,794 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:22,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:53:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:23,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:24,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:53:24,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2030058217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:24,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420644935] [2021-11-12 22:53:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:24,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:24,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:24,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:53:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:53:26,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:53:26,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420644935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:26,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:53:26,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-12 22:53:26,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681263813] [2021-11-12 22:53:26,959 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:53:26,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:53:26,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:53:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:53:26,960 INFO L87 Difference]: Start difference. First operand 701 states and 839 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:53:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:29,885 INFO L93 Difference]: Finished difference Result 2955 states and 3656 transitions. [2021-11-12 22:53:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:53:29,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-12 22:53:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:29,899 INFO L225 Difference]: With dead ends: 2955 [2021-11-12 22:53:29,899 INFO L226 Difference]: Without dead ends: 2301 [2021-11-12 22:53:29,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:29,903 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 2433 mSDsluCounter, 4439 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2395.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.20ms SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2663.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:29,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2484 Valid, 5221 Invalid, 708 Unknown, 0 Unchecked, 15.20ms Time], IncrementalHoareTripleChecker [223 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 2663.02ms Time] [2021-11-12 22:53:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-12 22:53:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1947. [2021-11-12 22:53:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1878 states have (on average 1.174653887113951) internal successors, (2206), 1890 states have internal predecessors, (2206), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-12 22:53:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2353 transitions. [2021-11-12 22:53:30,024 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2353 transitions. Word has length 279 [2021-11-12 22:53:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:30,025 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 2353 transitions. [2021-11-12 22:53:30,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:53:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2353 transitions. [2021-11-12 22:53:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-12 22:53:30,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:30,036 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:30,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:30,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-12 22:53:30,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-12 22:53:30,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:30,660 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1647678185, now seen corresponding path program 2 times [2021-11-12 22:53:30,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:30,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858556356] [2021-11-12 22:53:30,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:53:30,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:30,665 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:30,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:53:32,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:53:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:53:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 22:53:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 22:53:35,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:35,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858556356] [2021-11-12 22:53:35,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858556356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:35,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1880045182] [2021-11-12 22:53:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:53:35,060 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:35,060 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:53:38,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:53:38,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:53:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 22:53:39,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 22:53:41,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1880045182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:41,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883041662] [2021-11-12 22:53:41,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:53:41,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:41,059 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 22:53:42,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:53:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:53:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-12 22:53:43,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-12 22:53:44,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883041662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:44,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:53:44,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-12 22:53:44,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492818698] [2021-11-12 22:53:44,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:53:44,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:53:44,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:53:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:53:44,926 INFO L87 Difference]: Start difference. First operand 1947 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:53:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:46,426 INFO L93 Difference]: Finished difference Result 3873 states and 4886 transitions. [2021-11-12 22:53:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-12 22:53:46,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-12 22:53:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:46,444 INFO L225 Difference]: With dead ends: 3873 [2021-11-12 22:53:46,444 INFO L226 Difference]: Without dead ends: 1967 [2021-11-12 22:53:46,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:53:46,451 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 156 mSDsluCounter, 2342 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 535.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 622.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:46,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 2643 Invalid, 386 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [89 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 622.29ms Time] [2021-11-12 22:53:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-12 22:53:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1959. [2021-11-12 22:53:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1890 states have (on average 1.1756613756613756) internal successors, (2222), 1902 states have internal predecessors, (2222), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-12 22:53:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2369 transitions. [2021-11-12 22:53:46,541 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2369 transitions. Word has length 679 [2021-11-12 22:53:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2369 transitions. [2021-11-12 22:53:46,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:53:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2369 transitions. [2021-11-12 22:53:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-12 22:53:46,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:46,554 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:46,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:46,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:47,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:47,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:47,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash -193391593, now seen corresponding path program 3 times [2021-11-12 22:53:47,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:47,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949840877] [2021-11-12 22:53:47,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:53:47,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:47,205 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:47,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c4ad65-bf27-49d2-8251-94bc45f2922f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process