./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs --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 64bit --witnessprinter.graph.data.programhash 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:42,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:42,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:42,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:42,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:42,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:42,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:42,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:42,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:42,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:42,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:42,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:42,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:42,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:42,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:42,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:42,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:42,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:42,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:42,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:42,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:42,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:42,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:42,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:42,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:42,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:42,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:42,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:42,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:42,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:42,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:42,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:42,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:42,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:42,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:42,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:42,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:42,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:42,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:42,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:42,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:42,595 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:37:42,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:42,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:42,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:42,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:42,644 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:42,644 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:42,644 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:42,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:37:42,645 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:42,645 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:42,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:37:42,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:37:42,647 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:42,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:37:42,647 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:37:42,647 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:37:42,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:42,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:37:42,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:42,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:42,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:42,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:42,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:42,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:42,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:42,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:42,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:42,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:42,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:42,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:42,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:42,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:42,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:37:42,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:37:42,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:42,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:42,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:42,655 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_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 [2021-11-19 13:37:42,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:42,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:42,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:42,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:42,979 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:42,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-19 13:37:43,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/d467f4a72/44145628a777473ab8b69920ca940531/FLAGc4fab406e [2021-11-19 13:37:44,035 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:44,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-19 13:37:44,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/d467f4a72/44145628a777473ab8b69920ca940531/FLAGc4fab406e [2021-11-19 13:37:44,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/d467f4a72/44145628a777473ab8b69920ca940531 [2021-11-19 13:37:44,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:44,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:44,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:44,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:44,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:44,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:44" (1/1) ... [2021-11-19 13:37:44,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3219e9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:44, skipping insertion in model container [2021-11-19 13:37:44,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:44" (1/1) ... [2021-11-19 13:37:44,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:44,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:46,387 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:46,390 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:46,526 WARN L230 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_25cf5422-748f-42f4-ab32-19431e28f0dd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-19 13:37:46,596 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:46,681 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) [2021-11-19 13:37:46,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6419c264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:46, skipping insertion in model container [2021-11-19 13:37:46,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:46,683 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:37:46,685 INFO L158 Benchmark]: Toolchain (without parser) took 2286.79ms. Allocated memory was 104.9MB in the beginning and 161.5MB in the end (delta: 56.6MB). Free memory was 75.4MB in the beginning and 104.1MB in the end (delta: -28.7MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2021-11-19 13:37:46,686 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:37:46,688 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2270.25ms. Allocated memory was 104.9MB in the beginning and 161.5MB in the end (delta: 56.6MB). Free memory was 75.1MB in the beginning and 104.1MB in the end (delta: -29.0MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2021-11-19 13:37:46,690 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2270.25ms. Allocated memory was 104.9MB in the beginning and 161.5MB in the end (delta: 56.6MB). Free memory was 75.1MB in the beginning and 104.1MB in the end (delta: -29.0MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6325]: 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_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs --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 64bit --witnessprinter.graph.data.programhash 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:49,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:49,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:49,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:49,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:49,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:49,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:49,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:49,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:49,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:49,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:49,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:49,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:49,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:49,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:49,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:49,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:49,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:49,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:49,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:49,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:49,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:49,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:49,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:49,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:49,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:49,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:49,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:49,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:49,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:49,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:49,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:49,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:49,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:49,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:49,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:49,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:49,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:49,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:49,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:49,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:49,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:37:49,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:49,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:49,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:49,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:49,381 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:49,381 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:49,381 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:49,381 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:49,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:49,382 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:49,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:49,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:49,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:49,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:49,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:49,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:49,386 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:37:49,386 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:37:49,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:49,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:49,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:49,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:49,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:37:49,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:49,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:49,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:49,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:49,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:49,389 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:37:49,389 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:49,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:49,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:49,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:49,390 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_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 [2021-11-19 13:37:49,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:49,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:49,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:49,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:49,816 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:49,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-19 13:37:49,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/462d51ddd/04c07914e863496a96aa41d62c583f0c/FLAGf48bf0771 [2021-11-19 13:37:50,904 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:50,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-19 13:37:50,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/462d51ddd/04c07914e863496a96aa41d62c583f0c/FLAGf48bf0771 [2021-11-19 13:37:51,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/data/462d51ddd/04c07914e863496a96aa41d62c583f0c [2021-11-19 13:37:51,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:51,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:51,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:51,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:51,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:51,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:51" (1/1) ... [2021-11-19 13:37:51,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25edede8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:51, skipping insertion in model container [2021-11-19 13:37:51,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:51" (1/1) ... [2021-11-19 13:37:51,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:51,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:53,758 WARN L230 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_25cf5422-748f-42f4-ab32-19431e28f0dd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-19 13:37:53,819 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:53,916 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:37:53,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:54,250 WARN L230 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_25cf5422-748f-42f4-ab32-19431e28f0dd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-19 13:37:54,259 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:54,292 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:37:54,683 WARN L230 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_25cf5422-748f-42f4-ab32-19431e28f0dd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-19 13:37:54,691 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:54,960 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:37:54,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54 WrapperNode [2021-11-19 13:37:54,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:54,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:54,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:37:54,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:37:54,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,366 INFO L137 Inliner]: procedures = 241, calls = 1428, calls flagged for inlining = 121, calls inlined = 118, statements flattened = 3664 [2021-11-19 13:37:55,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:55,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:37:55,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:37:55,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:37:55,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:37:55,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:37:55,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:37:55,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:37:55,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (1/1) ... [2021-11-19 13:37:55,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:55,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:37:55,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:37:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:37:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_drvinfo [2021-11-19 13:37:55,846 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_drvinfo [2021-11-19 13:37:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-19 13:37:55,846 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-19 13:37:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:37:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:37:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 13:37:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 13:37:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 13:37:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 13:37:55,848 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 13:37:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 13:37:55,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 13:37:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 13:37:55,848 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 13:37:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-19 13:37:55,849 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-19 13:37:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 13:37:55,849 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 13:37:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-19 13:37:55,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-19 13:37:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 13:37:55,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 13:37:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-19 13:37:55,850 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-19 13:37:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 13:37:55,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 13:37:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-19 13:37:55,851 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-19 13:37:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-19 13:37:55,851 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-19 13:37:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 13:37:55,852 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 13:37:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:37:55,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:37:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 13:37:55,853 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 13:37:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-19 13:37:55,853 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-19 13:37:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 13:37:55,854 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 13:37:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:37:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-19 13:37:55,854 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-19 13:37:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-19 13:37:55,855 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-19 13:37:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:37:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-19 13:37:55,855 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-19 13:37:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-19 13:37:55,857 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-19 13:37:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-19 13:37:55,858 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-19 13:37:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-19 13:37:55,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-19 13:37:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-19 13:37:55,858 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-19 13:37:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:37:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:37:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 13:37:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:37:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:37:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-19 13:37:55,860 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-19 13:37:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:37:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 13:37:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:37:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:37:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 13:37:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-19 13:37:55,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-19 13:37:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-19 13:37:55,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-19 13:37:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-19 13:37:55,863 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-19 13:37:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 13:37:55,863 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 13:37:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 13:37:55,863 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 13:37:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 13:37:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 13:37:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-19 13:37:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-19 13:37:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-19 13:37:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-19 13:37:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 13:37:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 13:37:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-19 13:37:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-19 13:37:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_ioctl [2021-11-19 13:37:55,866 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_ioctl [2021-11-19 13:37:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-19 13:37:55,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-19 13:37:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-19 13:37:55,868 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-19 13:37:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 13:37:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 13:37:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 13:37:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 13:37:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-19 13:37:55,869 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-19 13:37:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 13:37:55,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 13:37:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 13:37:55,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 13:37:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:37:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 13:37:55,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 13:37:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:37:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 13:37:55,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 13:37:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:37:55,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 13:37:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 13:37:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-19 13:37:55,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-19 13:37:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2021-11-19 13:37:55,876 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2021-11-19 13:37:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-19 13:37:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-19 13:37:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 13:37:55,884 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-19 13:37:55,884 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-19 13:37:55,884 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2021-11-19 13:37:55,884 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2021-11-19 13:37:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-19 13:37:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-19 13:37:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-19 13:37:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-19 13:37:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-19 13:37:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-19 13:37:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-19 13:37:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-19 13:37:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 13:37:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-19 13:37:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-19 13:37:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-19 13:37:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-19 13:37:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-19 13:37:55,887 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-19 13:37:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-19 13:37:55,887 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-19 13:37:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:37:55,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:37:56,657 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:37:56,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:38:01,160 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 13:38:19,641 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:38:19,672 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:38:19,673 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:38:19,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:38:19 BoogieIcfgContainer [2021-11-19 13:38:19,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:38:19,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:38:19,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:38:19,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:38:19,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:37:51" (1/3) ... [2021-11-19 13:38:19,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411a7449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:38:19, skipping insertion in model container [2021-11-19 13:38:19,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:54" (2/3) ... [2021-11-19 13:38:19,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411a7449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:38:19, skipping insertion in model container [2021-11-19 13:38:19,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:38:19" (3/3) ... [2021-11-19 13:38:19,686 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-19 13:38:19,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:38:19,693 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:38:19,755 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:38:19,762 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 [2021-11-19 13:38:19,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:38:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 1175 states, 832 states have (on average 1.3353365384615385) internal successors, (1111), 860 states have internal predecessors, (1111), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) [2021-11-19 13:38:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 13:38:19,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:19,853 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:19,854 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 112166995, now seen corresponding path program 1 times [2021-11-19 13:38:19,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:19,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600265198] [2021-11-19 13:38:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:19,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:19,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:19,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:38:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:38:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 13:38:22,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-19 13:38:23,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:23,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600265198] [2021-11-19 13:38:23,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600265198] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:23,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:23,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 13:38:23,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636707303] [2021-11-19 13:38:23,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:23,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:38:23,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:38:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:38:23,134 INFO L87 Difference]: Start difference. First operand has 1175 states, 832 states have (on average 1.3353365384615385) internal successors, (1111), 860 states have internal predecessors, (1111), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:38:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:23,341 INFO L93 Difference]: Finished difference Result 2345 states and 3373 transitions. [2021-11-19 13:38:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:38:23,344 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2021-11-19 13:38:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:23,383 INFO L225 Difference]: With dead ends: 2345 [2021-11-19 13:38:23,383 INFO L226 Difference]: Without dead ends: 1152 [2021-11-19 13:38:23,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:38:23,402 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:23,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-19 13:38:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2021-11-19 13:38:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 819 states have (on average 1.321123321123321) internal successors, (1082), 837 states have internal predecessors, (1082), 277 states have call successors, (277), 56 states have call predecessors, (277), 55 states have return successors, (276), 266 states have call predecessors, (276), 276 states have call successors, (276) [2021-11-19 13:38:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1635 transitions. [2021-11-19 13:38:23,592 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1635 transitions. Word has length 162 [2021-11-19 13:38:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:23,593 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1635 transitions. [2021-11-19 13:38:23,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:38:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1635 transitions. [2021-11-19 13:38:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 13:38:23,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:23,609 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:23,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:38:23,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:23,835 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1911491745, now seen corresponding path program 1 times [2021-11-19 13:38:23,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:23,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555691678] [2021-11-19 13:38:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:23,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:23,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:23,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:23,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:38:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:38:25,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-19 13:38:26,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-19 13:38:27,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:27,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555691678] [2021-11-19 13:38:27,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555691678] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:27,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:27,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 13:38:27,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31795283] [2021-11-19 13:38:27,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:27,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:38:27,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:38:27,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:38:27,102 INFO L87 Difference]: Start difference. First operand 1152 states and 1635 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:38:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:27,476 INFO L93 Difference]: Finished difference Result 2294 states and 3256 transitions. [2021-11-19 13:38:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:38:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 162 [2021-11-19 13:38:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:27,493 INFO L225 Difference]: With dead ends: 2294 [2021-11-19 13:38:27,493 INFO L226 Difference]: Without dead ends: 1153 [2021-11-19 13:38:27,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:38:27,500 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 6 mSDsluCounter, 6509 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8139 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:27,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8139 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-11-19 13:38:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2021-11-19 13:38:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 820 states have (on average 1.3207317073170732) internal successors, (1083), 838 states have internal predecessors, (1083), 277 states have call successors, (277), 56 states have call predecessors, (277), 55 states have return successors, (276), 266 states have call predecessors, (276), 276 states have call successors, (276) [2021-11-19 13:38:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1636 transitions. [2021-11-19 13:38:27,578 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1636 transitions. Word has length 162 [2021-11-19 13:38:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:27,581 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1636 transitions. [2021-11-19 13:38:27,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:38:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1636 transitions. [2021-11-19 13:38:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 13:38:27,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:27,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:27,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:27,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:27,805 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1531313879, now seen corresponding path program 1 times [2021-11-19 13:38:27,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:27,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774752228] [2021-11-19 13:38:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:27,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:27,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:27,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:27,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:38:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:38:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:38:30,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 13:38:31,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:31,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774752228] [2021-11-19 13:38:31,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774752228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:31,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193704874] [2021-11-19 13:38:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:31,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:31,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:31,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:31,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 13:38:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:32,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:33,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [193704874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:33,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:38:33,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 13:38:33,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901802036] [2021-11-19 13:38:33,152 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:33,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:33,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:38:33,154 INFO L87 Difference]: Start difference. First operand 1153 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:38:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:33,682 INFO L93 Difference]: Finished difference Result 2961 states and 4155 transitions. [2021-11-19 13:38:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 164 [2021-11-19 13:38:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:33,702 INFO L225 Difference]: With dead ends: 2961 [2021-11-19 13:38:33,702 INFO L226 Difference]: Without dead ends: 1832 [2021-11-19 13:38:33,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:38:33,711 INFO L933 BasicCegarLoop]: 1764 mSDtfsCounter, 948 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:33,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 3276 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:38:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-11-19 13:38:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1800. [2021-11-19 13:38:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1294 states have (on average 1.3083462132921175) internal successors, (1693), 1321 states have internal predecessors, (1693), 407 states have call successors, (407), 99 states have call predecessors, (407), 98 states have return successors, (406), 392 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-19 13:38:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2506 transitions. [2021-11-19 13:38:33,839 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2506 transitions. Word has length 164 [2021-11-19 13:38:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:33,841 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2506 transitions. [2021-11-19 13:38:33,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:38:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2506 transitions. [2021-11-19 13:38:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 13:38:33,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:33,848 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:33,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:34,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:34,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:34,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 68504577, now seen corresponding path program 1 times [2021-11-19 13:38:34,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:34,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828681545] [2021-11-19 13:38:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:34,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:34,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:34,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:38:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:36,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:38:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:38:36,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 13:38:37,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:37,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828681545] [2021-11-19 13:38:37,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828681545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:37,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116735750] [2021-11-19 13:38:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:37,482 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:37,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:37,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 13:38:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:38:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:39,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:39,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116735750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:39,940 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:38:39,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 13:38:39,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416097794] [2021-11-19 13:38:39,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:39,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:38:39,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:38:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:38:39,942 INFO L87 Difference]: Start difference. First operand 1800 states and 2506 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:38:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:40,412 INFO L93 Difference]: Finished difference Result 5364 states and 7478 transitions. [2021-11-19 13:38:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:38:40,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 177 [2021-11-19 13:38:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:40,444 INFO L225 Difference]: With dead ends: 5364 [2021-11-19 13:38:40,444 INFO L226 Difference]: Without dead ends: 3593 [2021-11-19 13:38:40,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:38:40,456 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 1583 mSDsluCounter, 5575 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 7570 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:40,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 7570 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-11-19 13:38:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3578. [2021-11-19 13:38:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 2577 states have (on average 1.308498253783469) internal successors, (3372), 2631 states have internal predecessors, (3372), 804 states have call successors, (804), 197 states have call predecessors, (804), 196 states have return successors, (803), 775 states have call predecessors, (803), 803 states have call successors, (803) [2021-11-19 13:38:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 4979 transitions. [2021-11-19 13:38:40,703 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 4979 transitions. Word has length 177 [2021-11-19 13:38:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:40,704 INFO L470 AbstractCegarLoop]: Abstraction has 3578 states and 4979 transitions. [2021-11-19 13:38:40,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:38:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 4979 transitions. [2021-11-19 13:38:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 13:38:40,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:40,712 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:40,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:40,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 13:38:41,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:41,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1192288910, now seen corresponding path program 1 times [2021-11-19 13:38:41,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:41,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070922378] [2021-11-19 13:38:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:41,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:41,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:41,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:41,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:38:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:38:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:38:43,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 13:38:44,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:44,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070922378] [2021-11-19 13:38:44,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070922378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:44,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1303520369] [2021-11-19 13:38:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:44,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:44,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:44,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 13:38:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:38:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:46,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1303520369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:46,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:38:46,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 13:38:46,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052067367] [2021-11-19 13:38:46,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:46,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:38:46,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:38:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:38:46,345 INFO L87 Difference]: Start difference. First operand 3578 states and 4979 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:38:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:46,820 INFO L93 Difference]: Finished difference Result 10718 states and 14924 transitions. [2021-11-19 13:38:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:38:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 176 [2021-11-19 13:38:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:46,883 INFO L225 Difference]: With dead ends: 10718 [2021-11-19 13:38:46,883 INFO L226 Difference]: Without dead ends: 7169 [2021-11-19 13:38:46,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:38:46,908 INFO L933 BasicCegarLoop]: 1996 mSDtfsCounter, 1582 mSDsluCounter, 5577 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 7573 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:46,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 7573 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states. [2021-11-19 13:38:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7169 to 7142. [2021-11-19 13:38:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 5149 states have (on average 1.3076325500097106) internal successors, (6733), 5257 states have internal predecessors, (6733), 1598 states have call successors, (1598), 395 states have call predecessors, (1598), 394 states have return successors, (1597), 1541 states have call predecessors, (1597), 1597 states have call successors, (1597) [2021-11-19 13:38:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 9928 transitions. [2021-11-19 13:38:47,333 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 9928 transitions. Word has length 176 [2021-11-19 13:38:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:47,335 INFO L470 AbstractCegarLoop]: Abstraction has 7142 states and 9928 transitions. [2021-11-19 13:38:47,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:38:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 9928 transitions. [2021-11-19 13:38:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 13:38:47,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:47,341 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:47,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:47,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:47,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:47,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1791588644, now seen corresponding path program 1 times [2021-11-19 13:38:47,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:47,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445864407] [2021-11-19 13:38:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:47,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:47,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:47,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:38:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:38:49,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:38:50,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 13:38:50,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:50,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445864407] [2021-11-19 13:38:50,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445864407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:50,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981960791] [2021-11-19 13:38:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:50,818 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:50,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:50,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:50,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 13:38:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:38:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:52,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:38:53,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [981960791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:53,013 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:38:53,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 13:38:53,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121945380] [2021-11-19 13:38:53,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:53,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:38:53,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:53,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:38:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:38:53,015 INFO L87 Difference]: Start difference. First operand 7142 states and 9928 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:38:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:53,777 INFO L93 Difference]: Finished difference Result 21450 states and 29821 transitions. [2021-11-19 13:38:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:38:53,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 175 [2021-11-19 13:38:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:53,922 INFO L225 Difference]: With dead ends: 21450 [2021-11-19 13:38:53,923 INFO L226 Difference]: Without dead ends: 14337 [2021-11-19 13:38:53,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:38:53,966 INFO L933 BasicCegarLoop]: 1997 mSDtfsCounter, 1581 mSDsluCounter, 5579 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 7576 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:53,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 7576 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14337 states. [2021-11-19 13:38:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14337 to 14286. [2021-11-19 13:38:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 10305 states have (on average 1.306259097525473) internal successors, (13461), 10521 states have internal predecessors, (13461), 3186 states have call successors, (3186), 795 states have call predecessors, (3186), 794 states have return successors, (3185), 3073 states have call predecessors, (3185), 3185 states have call successors, (3185) [2021-11-19 13:38:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 19832 transitions. [2021-11-19 13:38:54,982 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 19832 transitions. Word has length 175 [2021-11-19 13:38:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:54,983 INFO L470 AbstractCegarLoop]: Abstraction has 14286 states and 19832 transitions. [2021-11-19 13:38:54,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:38:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 19832 transitions. [2021-11-19 13:38:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 13:38:54,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:54,989 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:38:55,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:55,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:55,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:55,407 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash -768049547, now seen corresponding path program 1 times [2021-11-19 13:38:55,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:55,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715367096] [2021-11-19 13:38:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:55,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:55,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:55,410 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:55,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:38:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:38:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-19 13:38:57,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 13:38:58,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:58,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715367096] [2021-11-19 13:38:58,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715367096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:58,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [126765489] [2021-11-19 13:38:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:58,453 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:58,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:58,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:58,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 13:38:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:38:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:39:00,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:39:00,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [126765489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:00,685 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:39:00,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [7, 7] total 14 [2021-11-19 13:39:00,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818177911] [2021-11-19 13:39:00,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:00,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:39:00,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:39:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:39:00,688 INFO L87 Difference]: Start difference. First operand 14286 states and 19832 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:39:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:01,964 INFO L93 Difference]: Finished difference Result 42428 states and 58885 transitions. [2021-11-19 13:39:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:39:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 174 [2021-11-19 13:39:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:02,101 INFO L225 Difference]: With dead ends: 42428 [2021-11-19 13:39:02,102 INFO L226 Difference]: Without dead ends: 28171 [2021-11-19 13:39:02,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:39:02,162 INFO L933 BasicCegarLoop]: 2365 mSDtfsCounter, 1582 mSDsluCounter, 6314 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 8679 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:02,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 8679 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:39:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28171 states. [2021-11-19 13:39:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28171 to 27870. [2021-11-19 13:39:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27870 states, 20085 states have (on average 1.3069952701020662) internal successors, (26251), 20549 states have internal predecessors, (26251), 6229 states have call successors, (6229), 1556 states have call predecessors, (6229), 1555 states have return successors, (6228), 5968 states have call predecessors, (6228), 6228 states have call successors, (6228) [2021-11-19 13:39:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27870 states to 27870 states and 38708 transitions. [2021-11-19 13:39:03,828 INFO L78 Accepts]: Start accepts. Automaton has 27870 states and 38708 transitions. Word has length 174 [2021-11-19 13:39:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 27870 states and 38708 transitions. [2021-11-19 13:39:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:39:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 27870 states and 38708 transitions. [2021-11-19 13:39:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 13:39:03,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:03,835 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:39:03,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:04,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-19 13:39:04,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:39:04,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash 946240290, now seen corresponding path program 1 times [2021-11-19 13:39:04,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:04,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225019882] [2021-11-19 13:39:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:04,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:04,262 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:04,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:39:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:05,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:39:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-19 13:39:06,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-19 13:39:07,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:07,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225019882] [2021-11-19 13:39:07,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225019882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:07,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809179799] [2021-11-19 13:39:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:07,298 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:39:07,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:39:07,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:39:07,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:39:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:39:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-19 13:39:09,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-19 13:39:09,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809179799] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:39:09,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:39:09,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7] total 19 [2021-11-19 13:39:09,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039911140] [2021-11-19 13:39:09,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:09,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:39:09,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:39:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:39:09,916 INFO L87 Difference]: Start difference. First operand 27870 states and 38708 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 13:39:12,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:14,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:24,617 INFO L93 Difference]: Finished difference Result 75806 states and 106365 transitions. [2021-11-19 13:39:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:39:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 188 [2021-11-19 13:39:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:24,909 INFO L225 Difference]: With dead ends: 75806 [2021-11-19 13:39:24,910 INFO L226 Difference]: Without dead ends: 47965 [2021-11-19 13:39:25,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 731 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:39:25,275 INFO L933 BasicCegarLoop]: 3084 mSDtfsCounter, 3086 mSDsluCounter, 11377 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 529 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3093 SdHoareTripleChecker+Valid, 14461 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:25,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3093 Valid, 14461 Invalid, 3047 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [529 Valid, 2516 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2021-11-19 13:39:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47965 states. [2021-11-19 13:39:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47965 to 41366. [2021-11-19 13:39:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41366 states, 29809 states have (on average 1.3078264953537522) internal successors, (38985), 30489 states have internal predecessors, (38985), 9256 states have call successors, (9256), 2301 states have call predecessors, (9256), 2300 states have return successors, (9255), 8879 states have call predecessors, (9255), 9255 states have call successors, (9255) [2021-11-19 13:39:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41366 states to 41366 states and 57496 transitions. [2021-11-19 13:39:28,123 INFO L78 Accepts]: Start accepts. Automaton has 41366 states and 57496 transitions. Word has length 188 [2021-11-19 13:39:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:28,124 INFO L470 AbstractCegarLoop]: Abstraction has 41366 states and 57496 transitions. [2021-11-19 13:39:28,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 13:39:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41366 states and 57496 transitions. [2021-11-19 13:39:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 13:39:28,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:28,132 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:39:28,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:28,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:28,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:28,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1485401942, now seen corresponding path program 1 times [2021-11-19 13:39:28,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:28,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051699569] [2021-11-19 13:39:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:28,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:28,548 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:28,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:39:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:39:30,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-19 13:39:31,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-19 13:39:31,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:31,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051699569] [2021-11-19 13:39:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051699569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:31,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1578935163] [2021-11-19 13:39:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:31,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:39:31,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:39:31,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:39:31,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:39:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:39:32,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:39:33,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:39:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1578935163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:34,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261302842] [2021-11-19 13:39:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:34,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:39:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:39:34,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:39:34,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 13:39:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:39:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:39:36,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:39:37,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261302842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:37,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:39:37,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 9, 8, 9] total 20 [2021-11-19 13:39:37,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151247373] [2021-11-19 13:39:37,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:39:37,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:39:37,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:39:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:39:37,223 INFO L87 Difference]: Start difference. First operand 41366 states and 57496 transitions. Second operand has 20 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 13:39:39,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:41,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:43,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:40:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:14,468 INFO L93 Difference]: Finished difference Result 89787 states and 124679 transitions. [2021-11-19 13:40:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 13:40:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 189 [2021-11-19 13:40:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:14,703 INFO L225 Difference]: With dead ends: 89787 [2021-11-19 13:40:14,703 INFO L226 Difference]: Without dead ends: 48376 [2021-11-19 13:40:14,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1169 GetRequests, 1116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=364, Invalid=2606, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 13:40:14,826 INFO L933 BasicCegarLoop]: 4166 mSDtfsCounter, 6491 mSDsluCounter, 46581 mSDsCounter, 0 mSdLazyCounter, 8598 mSolverCounterSat, 2206 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6498 SdHoareTripleChecker+Valid, 50747 SdHoareTripleChecker+Invalid, 10807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2206 IncrementalHoareTripleChecker+Valid, 8598 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:14,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6498 Valid, 50747 Invalid, 10807 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2206 Valid, 8598 Invalid, 3 Unknown, 0 Unchecked, 32.5s Time] [2021-11-19 13:40:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48376 states. [2021-11-19 13:40:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48376 to 47919. [2021-11-19 13:40:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47919 states, 34530 states have (on average 1.307500724008109) internal successors, (45148), 35326 states have internal predecessors, (45148), 10719 states have call successors, (10719), 2670 states have call predecessors, (10719), 2669 states have return successors, (10726), 10274 states have call predecessors, (10726), 10718 states have call successors, (10726) [2021-11-19 13:40:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47919 states to 47919 states and 66593 transitions. [2021-11-19 13:40:17,486 INFO L78 Accepts]: Start accepts. Automaton has 47919 states and 66593 transitions. Word has length 189 [2021-11-19 13:40:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:17,487 INFO L470 AbstractCegarLoop]: Abstraction has 47919 states and 66593 transitions. [2021-11-19 13:40:17,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 13:40:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 47919 states and 66593 transitions. [2021-11-19 13:40:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 13:40:17,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:17,500 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2021-11-19 13:40:17,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:17,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:17,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:18,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:40:18,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1560386145, now seen corresponding path program 1 times [2021-11-19 13:40:18,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:18,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759877382] [2021-11-19 13:40:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:18,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:18,120 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:18,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:40:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:40:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-19 13:40:20,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-19 13:40:21,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:21,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759877382] [2021-11-19 13:40:21,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759877382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:40:21,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1706813825] [2021-11-19 13:40:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:21,457 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:40:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:40:21,458 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:40:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 13:40:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:40:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:40:23,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:40:24,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1706813825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:40:24,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336745051] [2021-11-19 13:40:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:24,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:40:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:40:24,538 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:40:24,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 13:40:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:25,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:40:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:40:26,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:40:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336745051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:40:27,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:40:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9, 8, 9] total 22 [2021-11-19 13:40:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772369752] [2021-11-19 13:40:27,169 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:40:27,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 13:40:27,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 13:40:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:40:27,172 INFO L87 Difference]: Start difference. First operand 47919 states and 66593 transitions. Second operand has 22 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 13:40:29,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:40:31,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:40:33,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:04,237 INFO L93 Difference]: Finished difference Result 102909 states and 142893 transitions. [2021-11-19 13:41:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 13:41:04,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 192 [2021-11-19 13:41:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:04,449 INFO L225 Difference]: With dead ends: 102909 [2021-11-19 13:41:04,449 INFO L226 Difference]: Without dead ends: 54937 [2021-11-19 13:41:04,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=401, Invalid=3139, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 13:41:04,834 INFO L933 BasicCegarLoop]: 3993 mSDtfsCounter, 6624 mSDsluCounter, 48543 mSDsCounter, 0 mSdLazyCounter, 9180 mSolverCounterSat, 2265 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6631 SdHoareTripleChecker+Valid, 52536 SdHoareTripleChecker+Invalid, 11448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2265 IncrementalHoareTripleChecker+Valid, 9180 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:04,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6631 Valid, 52536 Invalid, 11448 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2265 Valid, 9180 Invalid, 3 Unknown, 0 Unchecked, 32.3s Time] [2021-11-19 13:41:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54937 states. [2021-11-19 13:41:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54937 to 51476. [2021-11-19 13:41:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51476 states, 37103 states have (on average 1.3072797347923348) internal successors, (48504), 37963 states have internal predecessors, (48504), 11507 states have call successors, (11507), 2866 states have call predecessors, (11507), 2865 states have return successors, (11520), 11024 states have call predecessors, (11520), 11506 states have call successors, (11520) [2021-11-19 13:41:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51476 states to 51476 states and 71531 transitions. [2021-11-19 13:41:07,665 INFO L78 Accepts]: Start accepts. Automaton has 51476 states and 71531 transitions. Word has length 192 [2021-11-19 13:41:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:07,666 INFO L470 AbstractCegarLoop]: Abstraction has 51476 states and 71531 transitions. [2021-11-19 13:41:07,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 13:41:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 51476 states and 71531 transitions. [2021-11-19 13:41:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 13:41:07,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:07,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-19 13:41:07,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:07,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:08,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 13:41:08,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:08,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash 449035645, now seen corresponding path program 1 times [2021-11-19 13:41:08,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:08,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616951417] [2021-11-19 13:41:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:08,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:08,309 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:08,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:41:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:41:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:41:10,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-19 13:41:11,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616951417] [2021-11-19 13:41:11,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616951417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:41:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948183681] [2021-11-19 13:41:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:11,918 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:41:11,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:41:11,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:41:11,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 13:41:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:41:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 13:41:14,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 13:41:15,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948183681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:41:15,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879443355] [2021-11-19 13:41:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:15,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:41:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:41:15,012 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:41:15,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 13:41:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:41:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 13:41:17,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 13:41:17,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879443355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:41:17,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:41:17,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 9, 8, 9] total 24 [2021-11-19 13:41:17,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300322484] [2021-11-19 13:41:17,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:41:17,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 13:41:17,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 13:41:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:41:17,848 INFO L87 Difference]: Start difference. First operand 51476 states and 71531 transitions. Second operand has 24 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 13:41:19,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:21,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:24,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:42:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:01,259 INFO L93 Difference]: Finished difference Result 110033 states and 152781 transitions. [2021-11-19 13:42:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-19 13:42:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 195 [2021-11-19 13:42:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:01,485 INFO L225 Difference]: With dead ends: 110033 [2021-11-19 13:42:01,485 INFO L226 Difference]: Without dead ends: 58500 [2021-11-19 13:42:01,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 1148 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 13:42:01,620 INFO L933 BasicCegarLoop]: 4029 mSDtfsCounter, 6397 mSDsluCounter, 52535 mSDsCounter, 0 mSdLazyCounter, 10421 mSolverCounterSat, 2186 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6404 SdHoareTripleChecker+Valid, 56564 SdHoareTripleChecker+Invalid, 12610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2186 IncrementalHoareTripleChecker+Valid, 10421 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:01,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6404 Valid, 56564 Invalid, 12610 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2186 Valid, 10421 Invalid, 3 Unknown, 0 Unchecked, 37.2s Time] [2021-11-19 13:42:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58500 states. [2021-11-19 13:42:04,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58500 to 53273. [2021-11-19 13:42:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53273 states, 38407 states have (on average 1.3070534017236441) internal successors, (50200), 39300 states have internal predecessors, (50200), 11902 states have call successors, (11902), 2964 states have call predecessors, (11902), 2963 states have return successors, (11919), 11399 states have call predecessors, (11919), 11901 states have call successors, (11919) [2021-11-19 13:42:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53273 states to 53273 states and 74021 transitions. [2021-11-19 13:42:04,483 INFO L78 Accepts]: Start accepts. Automaton has 53273 states and 74021 transitions. Word has length 195 [2021-11-19 13:42:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:04,484 INFO L470 AbstractCegarLoop]: Abstraction has 53273 states and 74021 transitions. [2021-11-19 13:42:04,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 13:42:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 53273 states and 74021 transitions. [2021-11-19 13:42:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 13:42:04,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:04,493 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:42:04,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-19 13:42:04,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:04,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-19 13:42:05,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:05,119 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:05,119 INFO L85 PathProgramCache]: Analyzing trace with hash 423942989, now seen corresponding path program 1 times [2021-11-19 13:42:05,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:42:05,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830766136] [2021-11-19 13:42:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:05,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:42:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:42:05,123 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:42:05,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:42:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:07,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:42:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-19 13:42:08,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-19 13:42:09,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:42:09,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830766136] [2021-11-19 13:42:09,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830766136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:09,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54817563] [2021-11-19 13:42:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:09,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:42:09,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:42:09,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 13:42:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:42:10,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-19 13:42:11,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-19 13:42:12,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54817563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:12,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359657740] [2021-11-19 13:42:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:12,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:42:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:42:12,259 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:42:12,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 13:42:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:13,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:42:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-19 13:42:14,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-19 13:42:15,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359657740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:15,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:42:15,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 12, 11, 12] total 16 [2021-11-19 13:42:15,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649643498] [2021-11-19 13:42:15,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:42:15,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:42:15,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:42:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:42:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:42:15,096 INFO L87 Difference]: Start difference. First operand 53273 states and 74021 transitions. Second operand has 16 states, 16 states have (on average 7.0) internal successors, (112), 13 states have internal predecessors, (112), 4 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (34), 5 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 13:42:17,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:42:19,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:42:21,230 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:43:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:09,898 INFO L93 Difference]: Finished difference Result 174839 states and 247076 transitions. [2021-11-19 13:43:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 13:43:09,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 13 states have internal predecessors, (112), 4 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (34), 5 states have call predecessors, (34), 4 states have call successors, (34) Word has length 209 [2021-11-19 13:43:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:10,287 INFO L225 Difference]: With dead ends: 174839 [2021-11-19 13:43:10,288 INFO L226 Difference]: Without dead ends: 121598 [2021-11-19 13:43:10,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1282 GetRequests, 1235 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=445, Invalid=1907, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 13:43:10,432 INFO L933 BasicCegarLoop]: 5468 mSDtfsCounter, 11202 mSDsluCounter, 39665 mSDsCounter, 0 mSdLazyCounter, 13778 mSolverCounterSat, 4946 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11209 SdHoareTripleChecker+Valid, 45133 SdHoareTripleChecker+Invalid, 18727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4946 IncrementalHoareTripleChecker+Valid, 13778 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:10,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11209 Valid, 45133 Invalid, 18727 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4946 Valid, 13778 Invalid, 3 Unknown, 0 Unchecked, 46.2s Time] [2021-11-19 13:43:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121598 states. [2021-11-19 13:43:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121598 to 60111. [2021-11-19 13:43:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60111 states, 43329 states have (on average 1.3055459392093056) internal successors, (56568), 44338 states have internal predecessors, (56568), 13403 states have call successors, (13403), 3363 states have call predecessors, (13403), 3378 states have return successors, (13484), 12848 states have call predecessors, (13484), 13402 states have call successors, (13484) [2021-11-19 13:43:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60111 states to 60111 states and 83455 transitions. [2021-11-19 13:43:14,890 INFO L78 Accepts]: Start accepts. Automaton has 60111 states and 83455 transitions. Word has length 209 [2021-11-19 13:43:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:14,891 INFO L470 AbstractCegarLoop]: Abstraction has 60111 states and 83455 transitions. [2021-11-19 13:43:14,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 13 states have internal predecessors, (112), 4 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (34), 5 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 13:43:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60111 states and 83455 transitions. [2021-11-19 13:43:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-19 13:43:14,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:14,904 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:14,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:15,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-19 13:43:15,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:15,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1135866454, now seen corresponding path program 1 times [2021-11-19 13:43:15,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:43:15,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237584679] [2021-11-19 13:43:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:15,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:43:15,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:43:15,524 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:43:15,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cf5422-748f-42f4-ab32-19431e28f0dd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:43:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:43:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-19 13:43:19,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-11-19 13:43:19,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:43:19,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237584679] [2021-11-19 13:43:19,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237584679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:19,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:19,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:43:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836151779] [2021-11-19 13:43:19,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:19,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:19,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:43:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:19,957 INFO L87 Difference]: Start difference. First operand 60111 states and 83455 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-19 13:43:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:25,338 INFO L93 Difference]: Finished difference Result 166919 states and 231762 transitions. [2021-11-19 13:43:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 344 [2021-11-19 13:43:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:25,716 INFO L225 Difference]: With dead ends: 166919 [2021-11-19 13:43:25,716 INFO L226 Difference]: Without dead ends: 106840 [2021-11-19 13:43:25,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:25,851 INFO L933 BasicCegarLoop]: 2618 mSDtfsCounter, 1308 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 4209 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:25,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 4209 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:43:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106840 states.