./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:22:41,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:22:41,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:22:41,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:22:41,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:22:41,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:22:41,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:22:41,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:22:41,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:22:41,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:22:41,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:22:41,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:22:41,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:22:41,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:22:41,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:22:41,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:22:41,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:22:41,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:22:41,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:22:41,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:22:41,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:22:41,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:22:41,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:22:41,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:22:41,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:22:41,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:22:41,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:22:41,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:22:41,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:22:41,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:22:41,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:22:41,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:22:41,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:22:41,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:22:41,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:22:41,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:22:41,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:22:41,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:22:41,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:22:41,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:22:41,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:22:41,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:22:42,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:22:42,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:22:42,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:22:42,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:22:42,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:22:42,019 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:22:42,019 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:22:42,019 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:22:42,020 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:22:42,020 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:22:42,020 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:22:42,021 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:22:42,021 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:22:42,021 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:22:42,022 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:22:42,022 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:22:42,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:22:42,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:22:42,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:22:42,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:22:42,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:22:42,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:22:42,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:22:42,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:22:42,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:22:42,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:22:42,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:22:42,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:22:42,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:22:42,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:22:42,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:22:42,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:22:42,028 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:22:42,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:22:42,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:22:42,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:22:42,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:22:42,029 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_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a [2021-11-12 22:22:42,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:22:42,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:22:42,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:22:42,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:22:42,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:22:42,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2021-11-12 22:22:42,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/30939d1c9/0d86f0bc804c46dd9caeffb9e830d3f5/FLAG91d347ec1 [2021-11-12 22:22:43,271 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:22:43,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2021-11-12 22:22:43,318 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/30939d1c9/0d86f0bc804c46dd9caeffb9e830d3f5/FLAG91d347ec1 [2021-11-12 22:22:43,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/30939d1c9/0d86f0bc804c46dd9caeffb9e830d3f5 [2021-11-12 22:22:43,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:22:43,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:22:43,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:22:43,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:22:43,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:22:43,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:22:43" (1/1) ... [2021-11-12 22:22:43,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5033c250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:43, skipping insertion in model container [2021-11-12 22:22:43,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:22:43" (1/1) ... [2021-11-12 22:22:43,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:22:43,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:22:45,471 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2021-11-12 22:22:45,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:22:45,549 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:22:45,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11c8f4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:45, skipping insertion in model container [2021-11-12 22:22:45,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:22:45,550 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:22:45,552 INFO L158 Benchmark]: Toolchain (without parser) took 1774.40ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 61.7MB in the beginning and 76.0MB in the end (delta: -14.3MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2021-11-12 22:22:45,553 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory was 57.6MB in the beginning and 57.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:22:45,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1769.19ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 61.4MB in the beginning and 76.0MB in the end (delta: -14.6MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2021-11-12 22:22:45,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory was 57.6MB in the beginning and 57.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1769.19ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 61.4MB in the beginning and 76.0MB in the end (delta: -14.6MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5135]: 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_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:22:47,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:22:47,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:22:47,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:22:47,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:22:47,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:22:47,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:22:47,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:22:47,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:22:47,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:22:47,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:22:47,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:22:47,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:22:47,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:22:47,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:22:47,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:22:47,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:22:47,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:22:47,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:22:47,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:22:47,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:22:47,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:22:47,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:22:47,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:22:47,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:22:47,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:22:47,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:22:47,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:22:47,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:22:47,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:22:47,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:22:47,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:22:47,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:22:47,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:22:47,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:22:47,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:22:47,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:22:47,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:22:47,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:22:47,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:22:47,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:22:47,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:22:47,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:22:47,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:22:47,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:22:47,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:22:47,866 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:22:47,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:22:47,867 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:22:47,867 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:22:47,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:22:47,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:22:47,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:22:47,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:22:47,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:22:47,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:22:47,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:22:47,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:22:47,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:22:47,870 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:22:47,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:22:47,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:22:47,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:22:47,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:22:47,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:22:47,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:22:47,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:22:47,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:22:47,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:22:47,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:22:47,873 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:22:47,874 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:47,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:22:47,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:22:47,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:22:47,875 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_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a [2021-11-12 22:22:48,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:22:48,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:22:48,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:22:48,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:22:48,307 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:22:48,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2021-11-12 22:22:48,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/65b3e32ab/1a34000793574216b1dc0e6e7b4ee77e/FLAG0d1617c32 [2021-11-12 22:22:49,188 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:22:49,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2021-11-12 22:22:49,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/65b3e32ab/1a34000793574216b1dc0e6e7b4ee77e/FLAG0d1617c32 [2021-11-12 22:22:49,726 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/data/65b3e32ab/1a34000793574216b1dc0e6e7b4ee77e [2021-11-12 22:22:49,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:22:49,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:22:49,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:22:49,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:22:49,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:22:49,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:22:49" (1/1) ... [2021-11-12 22:22:49,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a397f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:49, skipping insertion in model container [2021-11-12 22:22:49,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:22:49" (1/1) ... [2021-11-12 22:22:49,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:22:49,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:22:51,161 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2021-11-12 22:22:51,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:22:51,257 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:22:51,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:22:51,642 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2021-11-12 22:22:51,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:22:51,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:22:51,998 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2021-11-12 22:22:52,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:22:52,233 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:22:52,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52 WrapperNode [2021-11-12 22:22:52,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:22:52,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:22:52,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:22:52,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:22:52,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:22:52,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:22:52,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:22:52,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:22:52,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:22:52,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:22:52,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:22:52,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:22:52,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (1/1) ... [2021-11-12 22:22:52,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:22:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:22:52,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:22:52,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:22:52,709 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-12 22:22:52,709 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-12 22:22:52,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:22:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_init [2021-11-12 22:22:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_init [2021-11-12 22:22:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-12 22:22:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-12 22:22:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:22:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:22:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:22:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:22:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 22:22:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 22:22:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2021-11-12 22:22:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2021-11-12 22:22:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 22:22:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 22:22:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:22:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:22:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_exit [2021-11-12 22:22:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_exit [2021-11-12 22:22:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2021-11-12 22:22:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2021-11-12 22:22:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 22:22:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 22:22:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2021-11-12 22:22:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2021-11-12 22:22:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-12 22:22:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-12 22:22:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2021-11-12 22:22:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2021-11-12 22:22:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:22:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:22:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:22:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:22:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-12 22:22:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-12 22:22:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 22:22:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 22:22:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2021-11-12 22:22:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2021-11-12 22:22:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:22:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2021-11-12 22:22:52,718 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2021-11-12 22:22:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 22:22:52,718 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 22:22:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:22:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:22:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:22:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2021-11-12 22:22:52,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2021-11-12 22:22:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:22:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:22:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-12 22:22:52,722 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-12 22:22:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-12 22:22:52,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-12 22:22:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:22:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-12 22:22:52,724 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-12 22:22:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-12 22:22:52,724 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-12 22:22:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-11-12 22:22:52,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-11-12 22:22:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:22:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:22:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-12 22:22:52,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-12 22:22:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:22:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:22:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:22:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:22:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:22:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:22:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:22:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-12 22:22:52,727 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-12 22:22:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-12 22:22:52,728 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-12 22:22:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:22:52,728 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:22:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-11-12 22:22:52,728 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-11-12 22:22:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-12 22:22:52,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-12 22:22:52,729 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 22:22:52,729 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 22:22:52,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2021-11-12 22:22:52,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2021-11-12 22:22:52,730 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2021-11-12 22:22:52,730 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2021-11-12 22:22:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:22:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2021-11-12 22:22:52,732 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2021-11-12 22:22:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-12 22:22:52,733 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-12 22:22:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:22:52,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:22:54,855 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2021-11-12 22:22:57,103 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 22:23:08,272 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2021-11-12 22:23:08,273 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2021-11-12 22:23:08,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:23:08,417 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-12 22:23:08,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:23:08 BoogieIcfgContainer [2021-11-12 22:23:08,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:23:08,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:23:08,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:23:08,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:23:08,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:22:49" (1/3) ... [2021-11-12 22:23:08,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3115d0fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:23:08, skipping insertion in model container [2021-11-12 22:23:08,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:22:52" (2/3) ... [2021-11-12 22:23:08,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3115d0fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:23:08, skipping insertion in model container [2021-11-12 22:23:08,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:23:08" (3/3) ... [2021-11-12 22:23:08,431 INFO L111 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2021-11-12 22:23:08,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:23:08,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:23:08,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:23:08,533 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:23:08,533 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:23:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 304 states have (on average 1.3519736842105263) internal successors, (411), 316 states have internal predecessors, (411), 91 states have call successors, (91), 35 states have call predecessors, (91), 34 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 22:23:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 22:23:08,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:08,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:08,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1517292025, now seen corresponding path program 1 times [2021-11-12 22:23:08,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:08,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489932537] [2021-11-12 22:23:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:08,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:08,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:08,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:08,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:23:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:23:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:09,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:09,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:09,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489932537] [2021-11-12 22:23:09,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489932537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:09,580 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:09,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 22:23:09,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503481936] [2021-11-12 22:23:09,582 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:09,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:23:09,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:23:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:23:09,630 INFO L87 Difference]: Start difference. First operand has 431 states, 304 states have (on average 1.3519736842105263) internal successors, (411), 316 states have internal predecessors, (411), 91 states have call successors, (91), 35 states have call predecessors, (91), 34 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:23:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:09,891 INFO L93 Difference]: Finished difference Result 1253 states and 1768 transitions. [2021-11-12 22:23:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:23:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-12 22:23:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:09,928 INFO L225 Difference]: With dead ends: 1253 [2021-11-12 22:23:09,929 INFO L226 Difference]: Without dead ends: 824 [2021-11-12 22:23:09,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:23:09,943 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 539 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:09,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1229 Invalid, 10 Unknown, 0 Unchecked, 26.25ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 50.20ms Time] [2021-11-12 22:23:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-11-12 22:23:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 820. [2021-11-12 22:23:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 581 states have (on average 1.2581755593803787) internal successors, (731), 593 states have internal predecessors, (731), 173 states have call successors, (173), 66 states have call predecessors, (173), 65 states have return successors, (172), 165 states have call predecessors, (172), 169 states have call successors, (172) [2021-11-12 22:23:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1076 transitions. [2021-11-12 22:23:10,115 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1076 transitions. Word has length 16 [2021-11-12 22:23:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:10,116 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1076 transitions. [2021-11-12 22:23:10,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:23:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1076 transitions. [2021-11-12 22:23:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 22:23:10,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:10,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:10,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:10,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:10,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash 208359179, now seen corresponding path program 1 times [2021-11-12 22:23:10,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:10,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774241851] [2021-11-12 22:23:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:10,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:10,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:10,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:10,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:23:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:23:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:11,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:11,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774241851] [2021-11-12 22:23:11,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774241851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:11,243 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:11,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 22:23:11,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422385121] [2021-11-12 22:23:11,244 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:11,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:23:11,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:23:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:23:11,247 INFO L87 Difference]: Start difference. First operand 820 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:23:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:11,404 INFO L93 Difference]: Finished difference Result 2433 states and 3207 transitions. [2021-11-12 22:23:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:23:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-12 22:23:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:11,421 INFO L225 Difference]: With dead ends: 2433 [2021-11-12 22:23:11,422 INFO L226 Difference]: Without dead ends: 1617 [2021-11-12 22:23:11,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:23:11,427 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 529 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:11,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1161 Invalid, 8 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 61.80ms Time] [2021-11-12 22:23:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-11-12 22:23:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1610. [2021-11-12 22:23:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1141 states have (on average 1.2541630148992111) internal successors, (1431), 1160 states have internal predecessors, (1431), 340 states have call successors, (340), 129 states have call predecessors, (340), 128 states have return successors, (346), 328 states have call predecessors, (346), 336 states have call successors, (346) [2021-11-12 22:23:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2117 transitions. [2021-11-12 22:23:11,556 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2117 transitions. Word has length 17 [2021-11-12 22:23:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:11,557 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 2117 transitions. [2021-11-12 22:23:11,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:23:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2117 transitions. [2021-11-12 22:23:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:23:11,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:11,571 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:11,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:11,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:11,787 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash 26582145, now seen corresponding path program 1 times [2021-11-12 22:23:11,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:11,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051044575] [2021-11-12 22:23:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:11,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:11,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:11,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:23:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:23:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:23:12,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:23:13,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:13,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051044575] [2021-11-12 22:23:13,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051044575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:13,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:13,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:23:13,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210939848] [2021-11-12 22:23:13,424 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:13,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:23:13,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:23:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:23:13,426 INFO L87 Difference]: Start difference. First operand 1610 states and 2117 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:23:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:13,575 INFO L93 Difference]: Finished difference Result 3212 states and 4225 transitions. [2021-11-12 22:23:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:23:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 71 [2021-11-12 22:23:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:13,588 INFO L225 Difference]: With dead ends: 3212 [2021-11-12 22:23:13,589 INFO L226 Difference]: Without dead ends: 1610 [2021-11-12 22:23:13,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:23:13,595 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 0 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:13,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2179 Invalid, 8 Unknown, 0 Unchecked, 30.65ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 36.93ms Time] [2021-11-12 22:23:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-11-12 22:23:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2021-11-12 22:23:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1141 states have (on average 1.2532865907099036) internal successors, (1430), 1160 states have internal predecessors, (1430), 340 states have call successors, (340), 129 states have call predecessors, (340), 128 states have return successors, (346), 328 states have call predecessors, (346), 336 states have call successors, (346) [2021-11-12 22:23:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2116 transitions. [2021-11-12 22:23:13,687 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2116 transitions. Word has length 71 [2021-11-12 22:23:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 2116 transitions. [2021-11-12 22:23:13,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:23:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2116 transitions. [2021-11-12 22:23:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:23:13,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:13,692 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:13,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:13,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:13,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2146869344, now seen corresponding path program 1 times [2021-11-12 22:23:13,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:13,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326072509] [2021-11-12 22:23:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:13,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:13,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:13,910 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:13,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:23:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:23:14,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:23:14,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:23:15,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:15,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326072509] [2021-11-12 22:23:15,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326072509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:15,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:15,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:23:15,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880648486] [2021-11-12 22:23:15,290 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:15,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:23:15,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:15,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:23:15,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:23:15,292 INFO L87 Difference]: Start difference. First operand 1610 states and 2116 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:23:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:16,036 INFO L93 Difference]: Finished difference Result 4640 states and 6494 transitions. [2021-11-12 22:23:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:23:16,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 71 [2021-11-12 22:23:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:16,062 INFO L225 Difference]: With dead ends: 4640 [2021-11-12 22:23:16,063 INFO L226 Difference]: Without dead ends: 3041 [2021-11-12 22:23:16,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:23:16,070 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 374 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.88ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 499.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:16,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 1810 Invalid, 78 Unknown, 0 Unchecked, 8.88ms Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 499.62ms Time] [2021-11-12 22:23:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-11-12 22:23:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 3017. [2021-11-12 22:23:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2140 states have (on average 1.3191588785046728) internal successors, (2823), 2191 states have internal predecessors, (2823), 748 states have call successors, (748), 129 states have call predecessors, (748), 128 states have return successors, (770), 720 states have call predecessors, (770), 744 states have call successors, (770) [2021-11-12 22:23:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4341 transitions. [2021-11-12 22:23:16,270 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4341 transitions. Word has length 71 [2021-11-12 22:23:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4341 transitions. [2021-11-12 22:23:16,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:23:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4341 transitions. [2021-11-12 22:23:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:23:16,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:16,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:16,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:16,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:16,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1152569613, now seen corresponding path program 1 times [2021-11-12 22:23:16,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:16,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102906598] [2021-11-12 22:23:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:16,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:16,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:16,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:16,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:23:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:23:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:17,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:17,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102906598] [2021-11-12 22:23:17,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102906598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:17,800 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:17,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:23:17,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473179528] [2021-11-12 22:23:17,801 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:17,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:23:17,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:23:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:23:17,802 INFO L87 Difference]: Start difference. First operand 3017 states and 4341 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:23:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:19,025 INFO L93 Difference]: Finished difference Result 10672 states and 15980 transitions. [2021-11-12 22:23:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:23:19,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-12 22:23:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:19,100 INFO L225 Difference]: With dead ends: 10672 [2021-11-12 22:23:19,100 INFO L226 Difference]: Without dead ends: 7667 [2021-11-12 22:23:19,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:23:19,117 INFO L933 BasicCegarLoop]: 1060 mSDtfsCounter, 669 mSDsluCounter, 3353 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 687.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 4413 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.50ms SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 763.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:19,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 4413 Invalid, 240 Unknown, 0 Unchecked, 15.50ms Time], IncrementalHoareTripleChecker [148 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 763.69ms Time] [2021-11-12 22:23:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2021-11-12 22:23:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 3041. [2021-11-12 22:23:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 2164 states have (on average 1.3156192236598891) internal successors, (2847), 2215 states have internal predecessors, (2847), 748 states have call successors, (748), 129 states have call predecessors, (748), 128 states have return successors, (770), 720 states have call predecessors, (770), 744 states have call successors, (770) [2021-11-12 22:23:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4365 transitions. [2021-11-12 22:23:19,505 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4365 transitions. Word has length 68 [2021-11-12 22:23:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:19,506 INFO L470 AbstractCegarLoop]: Abstraction has 3041 states and 4365 transitions. [2021-11-12 22:23:19,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:23:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4365 transitions. [2021-11-12 22:23:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:23:19,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:19,510 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:19,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:23:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:19,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1776712988, now seen corresponding path program 1 times [2021-11-12 22:23:19,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:19,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977261900] [2021-11-12 22:23:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:19,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:19,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:19,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:19,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:23:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:23:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:21,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:21,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977261900] [2021-11-12 22:23:21,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977261900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:21,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:21,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:23:21,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557596570] [2021-11-12 22:23:21,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:21,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:23:21,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:23:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:23:21,062 INFO L87 Difference]: Start difference. First operand 3041 states and 4365 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:23:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:22,104 INFO L93 Difference]: Finished difference Result 9292 states and 13796 transitions. [2021-11-12 22:23:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:23:22,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2021-11-12 22:23:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:22,157 INFO L225 Difference]: With dead ends: 9292 [2021-11-12 22:23:22,157 INFO L226 Difference]: Without dead ends: 6263 [2021-11-12 22:23:22,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:23:22,172 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 616 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 489.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.41ms SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 539.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:22,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 3419 Invalid, 232 Unknown, 0 Unchecked, 11.41ms Time], IncrementalHoareTripleChecker [163 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 539.45ms Time] [2021-11-12 22:23:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2021-11-12 22:23:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 3065. [2021-11-12 22:23:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 2188 states have (on average 1.3121572212065813) internal successors, (2871), 2239 states have internal predecessors, (2871), 748 states have call successors, (748), 129 states have call predecessors, (748), 128 states have return successors, (770), 720 states have call predecessors, (770), 744 states have call successors, (770) [2021-11-12 22:23:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 4389 transitions. [2021-11-12 22:23:22,571 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 4389 transitions. Word has length 69 [2021-11-12 22:23:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:22,572 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 4389 transitions. [2021-11-12 22:23:22,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:23:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 4389 transitions. [2021-11-12 22:23:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:23:22,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:22,576 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:22,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:22,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:22,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 676145405, now seen corresponding path program 1 times [2021-11-12 22:23:22,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:22,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024802132] [2021-11-12 22:23:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:22,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:22,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:22,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:22,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:23:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:23,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:23:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:24,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:25,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:25,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024802132] [2021-11-12 22:23:25,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024802132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:25,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:25,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 22:23:25,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668277335] [2021-11-12 22:23:25,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:25,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:23:25,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:23:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:23:25,178 INFO L87 Difference]: Start difference. First operand 3065 states and 4389 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:23:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:25,490 INFO L93 Difference]: Finished difference Result 4633 states and 6678 transitions. [2021-11-12 22:23:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:23:25,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-11-12 22:23:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:25,525 INFO L225 Difference]: With dead ends: 4633 [2021-11-12 22:23:25,525 INFO L226 Difference]: Without dead ends: 3097 [2021-11-12 22:23:25,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:23:25,533 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 2 mSDsluCounter, 2716 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:25,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3260 Invalid, 21 Unknown, 0 Unchecked, 7.43ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 100.79ms Time] [2021-11-12 22:23:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-11-12 22:23:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3097. [2021-11-12 22:23:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 2210 states have (on average 1.3090497737556561) internal successors, (2893), 2263 states have internal predecessors, (2893), 748 states have call successors, (748), 129 states have call predecessors, (748), 138 states have return successors, (808), 728 states have call predecessors, (808), 744 states have call successors, (808) [2021-11-12 22:23:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 4449 transitions. [2021-11-12 22:23:25,822 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 4449 transitions. Word has length 69 [2021-11-12 22:23:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:25,822 INFO L470 AbstractCegarLoop]: Abstraction has 3097 states and 4449 transitions. [2021-11-12 22:23:25,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:23:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 4449 transitions. [2021-11-12 22:23:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:23:25,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:25,826 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:25,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:26,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1333958436, now seen corresponding path program 1 times [2021-11-12 22:23:26,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:26,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347199471] [2021-11-12 22:23:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:26,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:26,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:26,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:23:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:23:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:27,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:28,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:28,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347199471] [2021-11-12 22:23:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347199471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:28,180 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:28,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-12 22:23:28,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034239186] [2021-11-12 22:23:28,181 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:23:28,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:23:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:23:28,182 INFO L87 Difference]: Start difference. First operand 3097 states and 4449 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 7 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:23:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:29,134 INFO L93 Difference]: Finished difference Result 7309 states and 10704 transitions. [2021-11-12 22:23:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:23:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 7 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-11-12 22:23:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:29,162 INFO L225 Difference]: With dead ends: 7309 [2021-11-12 22:23:29,163 INFO L226 Difference]: Without dead ends: 4224 [2021-11-12 22:23:29,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:23:29,176 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 217 mSDsluCounter, 7000 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 524.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 7914 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 559.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:29,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 7914 Invalid, 83 Unknown, 0 Unchecked, 23.63ms Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 559.22ms Time] [2021-11-12 22:23:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-11-12 22:23:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 3105. [2021-11-12 22:23:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 2218 states have (on average 1.306131650135257) internal successors, (2897), 2267 states have internal predecessors, (2897), 748 states have call successors, (748), 129 states have call predecessors, (748), 138 states have return successors, (808), 732 states have call predecessors, (808), 744 states have call successors, (808) [2021-11-12 22:23:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 4453 transitions. [2021-11-12 22:23:29,507 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 4453 transitions. Word has length 69 [2021-11-12 22:23:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:29,508 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 4453 transitions. [2021-11-12 22:23:29,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 7 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 5 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:23:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 4453 transitions. [2021-11-12 22:23:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:23:29,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:29,516 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:29,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:29,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:29,731 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1804654053, now seen corresponding path program 1 times [2021-11-12 22:23:29,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:29,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914760956] [2021-11-12 22:23:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:29,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:29,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:29,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:29,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:23:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:23:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:30,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:23:31,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:31,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914760956] [2021-11-12 22:23:31,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914760956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:31,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:23:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419591863] [2021-11-12 22:23:31,120 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:31,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:23:31,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:23:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:23:31,122 INFO L87 Difference]: Start difference. First operand 3105 states and 4453 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:23:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:31,520 INFO L93 Difference]: Finished difference Result 7485 states and 10950 transitions. [2021-11-12 22:23:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:23:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 75 [2021-11-12 22:23:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:31,547 INFO L225 Difference]: With dead ends: 7485 [2021-11-12 22:23:31,547 INFO L226 Difference]: Without dead ends: 4392 [2021-11-12 22:23:31,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:23:31,562 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 168 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 3063 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:31,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 3063 Invalid, 16 Unknown, 0 Unchecked, 7.92ms Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 120.48ms Time] [2021-11-12 22:23:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-11-12 22:23:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 2793. [2021-11-12 22:23:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2004 states have (on average 1.2969061876247505) internal successors, (2599), 2029 states have internal predecessors, (2599), 652 states have call successors, (652), 127 states have call predecessors, (652), 136 states have return successors, (709), 648 states have call predecessors, (709), 648 states have call successors, (709) [2021-11-12 22:23:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3960 transitions. [2021-11-12 22:23:31,839 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3960 transitions. Word has length 75 [2021-11-12 22:23:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:31,840 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 3960 transitions. [2021-11-12 22:23:31,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:23:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3960 transitions. [2021-11-12 22:23:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:23:31,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:31,843 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:31,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:32,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:32,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash -506709307, now seen corresponding path program 1 times [2021-11-12 22:23:32,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:32,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531963900] [2021-11-12 22:23:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:32,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:32,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:32,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:23:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:23:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:33,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:23:34,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:34,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531963900] [2021-11-12 22:23:34,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531963900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:34,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:34,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:23:34,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654308581] [2021-11-12 22:23:34,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:34,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:23:34,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:23:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:23:34,216 INFO L87 Difference]: Start difference. First operand 2793 states and 3960 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 8 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 22:23:36,289 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 [] [2021-11-12 22:23:38,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:40,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:42,761 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:44,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:48,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:50,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:53,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:55,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:57,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:59,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:04,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:06,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:09,252 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:11,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:13,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:15,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:17,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:19,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:24,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:26,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:28,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:30,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:32,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:34,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:36,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:39,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:41,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:43,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:45,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:47,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:54,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:54,967 INFO L93 Difference]: Finished difference Result 11531 states and 16542 transitions. [2021-11-12 22:24:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:24:54,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 8 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2021-11-12 22:24:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:55,007 INFO L225 Difference]: With dead ends: 11531 [2021-11-12 22:24:55,007 INFO L226 Difference]: Without dead ends: 9957 [2021-11-12 22:24:55,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:24:55,016 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 4963 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 2065 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77963.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5197 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 5390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.99ms SdHoareTripleChecker+Time, 2065 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79553.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:55,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5197 Valid, 3109 Invalid, 5390 Unknown, 0 Unchecked, 54.99ms Time], IncrementalHoareTripleChecker [2065 Valid, 3296 Invalid, 29 Unknown, 0 Unchecked, 79553.71ms Time] [2021-11-12 22:24:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2021-11-12 22:24:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 8639. [2021-11-12 22:24:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8639 states, 6194 states have (on average 1.3020665159832097) internal successors, (8065), 6273 states have internal predecessors, (8065), 2036 states have call successors, (2036), 373 states have call predecessors, (2036), 408 states have return successors, (2346), 2052 states have call predecessors, (2346), 2032 states have call successors, (2346) [2021-11-12 22:24:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8639 states to 8639 states and 12447 transitions. [2021-11-12 22:24:55,838 INFO L78 Accepts]: Start accepts. Automaton has 8639 states and 12447 transitions. Word has length 75 [2021-11-12 22:24:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 8639 states and 12447 transitions. [2021-11-12 22:24:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 8 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 22:24:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8639 states and 12447 transitions. [2021-11-12 22:24:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 22:24:55,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:55,844 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:24:55,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:56,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:56,063 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:56,063 INFO L85 PathProgramCache]: Analyzing trace with hash -9266808, now seen corresponding path program 1 times [2021-11-12 22:24:56,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:56,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255501404] [2021-11-12 22:24:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:56,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:56,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:56,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:56,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:24:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:24:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:24:57,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:24:57,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:57,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255501404] [2021-11-12 22:24:57,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255501404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:57,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:57,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:24:57,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617333487] [2021-11-12 22:24:57,381 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:24:57,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:24:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:24:57,382 INFO L87 Difference]: Start difference. First operand 8639 states and 12447 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-11-12 22:24:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:58,153 INFO L93 Difference]: Finished difference Result 17290 states and 25182 transitions. [2021-11-12 22:24:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:58,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 94 [2021-11-12 22:24:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:58,190 INFO L225 Difference]: With dead ends: 17290 [2021-11-12 22:24:58,190 INFO L226 Difference]: Without dead ends: 8663 [2021-11-12 22:24:58,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:24:58,217 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 0 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:58,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1088 Invalid, 5 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 43.88ms Time] [2021-11-12 22:24:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2021-11-12 22:24:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 8663. [2021-11-12 22:24:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8663 states, 6218 states have (on average 1.3009006111289805) internal successors, (8089), 6297 states have internal predecessors, (8089), 2036 states have call successors, (2036), 373 states have call predecessors, (2036), 408 states have return successors, (2346), 2052 states have call predecessors, (2346), 2032 states have call successors, (2346) [2021-11-12 22:24:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8663 states to 8663 states and 12471 transitions. [2021-11-12 22:24:59,014 INFO L78 Accepts]: Start accepts. Automaton has 8663 states and 12471 transitions. Word has length 94 [2021-11-12 22:24:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:59,014 INFO L470 AbstractCegarLoop]: Abstraction has 8663 states and 12471 transitions. [2021-11-12 22:24:59,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-11-12 22:24:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8663 states and 12471 transitions. [2021-11-12 22:24:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:24:59,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:59,019 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:24:59,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:59,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:59,235 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash -769332857, now seen corresponding path program 1 times [2021-11-12 22:24:59,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:59,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826414005] [2021-11-12 22:24:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:59,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:59,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:59,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:59,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:25:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:00,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:25:00,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:00,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:01,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:01,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826414005] [2021-11-12 22:25:01,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826414005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:01,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117220721] [2021-11-12 22:25:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:01,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:01,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:01,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:25:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:25:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:25:02,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:25:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2117220721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:02,770 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-12 22:25:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108989342] [2021-11-12 22:25:02,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:02,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:25:02,772 INFO L87 Difference]: Start difference. First operand 8663 states and 12471 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:25:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:03,325 INFO L93 Difference]: Finished difference Result 17350 states and 25092 transitions. [2021-11-12 22:25:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:25:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) Word has length 96 [2021-11-12 22:25:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:03,363 INFO L225 Difference]: With dead ends: 17350 [2021-11-12 22:25:03,363 INFO L226 Difference]: Without dead ends: 8699 [2021-11-12 22:25:03,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:25:03,383 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 2 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3303 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:03,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3303 Invalid, 22 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 93.61ms Time] [2021-11-12 22:25:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2021-11-12 22:25:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 8675. [2021-11-12 22:25:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8675 states, 6230 states have (on average 1.3003210272873194) internal successors, (8101), 6303 states have internal predecessors, (8101), 2036 states have call successors, (2036), 373 states have call predecessors, (2036), 408 states have return successors, (2346), 2058 states have call predecessors, (2346), 2032 states have call successors, (2346) [2021-11-12 22:25:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 12483 transitions. [2021-11-12 22:25:04,160 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 12483 transitions. Word has length 96 [2021-11-12 22:25:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:04,160 INFO L470 AbstractCegarLoop]: Abstraction has 8675 states and 12483 transitions. [2021-11-12 22:25:04,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:25:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 12483 transitions. [2021-11-12 22:25:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:25:04,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:04,175 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:04,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-12 22:25:04,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:04,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:04,580 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1062735864, now seen corresponding path program 1 times [2021-11-12 22:25:04,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:04,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953957967] [2021-11-12 22:25:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:04,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:04,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:04,584 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:04,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:25:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:25:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:05,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:06,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:06,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953957967] [2021-11-12 22:25:06,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953957967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:06,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445381680] [2021-11-12 22:25:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:06,314 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:06,315 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:06,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:25:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:25:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:25:07,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:25:08,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1445381680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:08,418 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:08,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-12 22:25:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952493339] [2021-11-12 22:25:08,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:08,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:25:08,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:25:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:25:08,420 INFO L87 Difference]: Start difference. First operand 8675 states and 12483 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 7 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:25:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:09,776 INFO L93 Difference]: Finished difference Result 16277 states and 23889 transitions. [2021-11-12 22:25:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:25:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 7 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) Word has length 96 [2021-11-12 22:25:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:09,824 INFO L225 Difference]: With dead ends: 16277 [2021-11-12 22:25:09,824 INFO L226 Difference]: Without dead ends: 11918 [2021-11-12 22:25:09,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:25:09,835 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 224 mSDsluCounter, 6892 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 667.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 7791 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 696.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:09,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 7791 Invalid, 57 Unknown, 0 Unchecked, 11.21ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 696.01ms Time] [2021-11-12 22:25:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-11-12 22:25:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 8723. [2021-11-12 22:25:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 6272 states have (on average 1.2983099489795917) internal successors, (8143), 6333 states have internal predecessors, (8143), 2036 states have call successors, (2036), 373 states have call predecessors, (2036), 414 states have return successors, (2406), 2076 states have call predecessors, (2406), 2032 states have call successors, (2406) [2021-11-12 22:25:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 12585 transitions. [2021-11-12 22:25:10,630 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 12585 transitions. Word has length 96 [2021-11-12 22:25:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:10,630 INFO L470 AbstractCegarLoop]: Abstraction has 8723 states and 12585 transitions. [2021-11-12 22:25:10,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 7 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:25:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 12585 transitions. [2021-11-12 22:25:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:25:10,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:10,634 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:10,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-12 22:25:10,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:25:11,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:11,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -360508632, now seen corresponding path program 1 times [2021-11-12 22:25:11,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:11,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111572869] [2021-11-12 22:25:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:11,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:11,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:11,038 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:11,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:25:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:11,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:25:11,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:12,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:12,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111572869] [2021-11-12 22:25:12,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111572869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:12,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547521801] [2021-11-12 22:25:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:12,998 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:12,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:12,999 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:13,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:25:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:25:13,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:25:14,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:25:15,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547521801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:15,137 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:15,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-12 22:25:15,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470926155] [2021-11-12 22:25:15,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:25:15,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:25:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:25:15,140 INFO L87 Difference]: Start difference. First operand 8723 states and 12585 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 8 states have internal predecessors, (75), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:25:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:17,245 INFO L93 Difference]: Finished difference Result 21633 states and 31757 transitions. [2021-11-12 22:25:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:25:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 8 states have internal predecessors, (75), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-11-12 22:25:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:17,295 INFO L225 Difference]: With dead ends: 21633 [2021-11-12 22:25:17,295 INFO L226 Difference]: Without dead ends: 12922 [2021-11-12 22:25:17,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:25:17,312 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 348 mSDsluCounter, 4346 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 890.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 5105 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.40ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 961.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:17,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 5105 Invalid, 110 Unknown, 0 Unchecked, 11.40ms Time], IncrementalHoareTripleChecker [68 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 961.05ms Time] [2021-11-12 22:25:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12922 states. [2021-11-12 22:25:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12922 to 8419. [2021-11-12 22:25:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8419 states, 6114 states have (on average 1.2965325482499181) internal successors, (7927), 6133 states have internal predecessors, (7927), 1912 states have call successors, (1912), 353 states have call predecessors, (1912), 392 states have return successors, (2248), 1992 states have call predecessors, (2248), 1908 states have call successors, (2248) [2021-11-12 22:25:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 12087 transitions. [2021-11-12 22:25:18,159 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 12087 transitions. Word has length 96 [2021-11-12 22:25:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 8419 states and 12087 transitions. [2021-11-12 22:25:18,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 8 states have internal predecessors, (75), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:25:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 12087 transitions. [2021-11-12 22:25:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 22:25:18,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:18,165 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:18,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:18,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:18,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:18,575 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash 197854953, now seen corresponding path program 1 times [2021-11-12 22:25:18,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:18,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6365848] [2021-11-12 22:25:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:18,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:18,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:18,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:25:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:25:19,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:19,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:20,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:20,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6365848] [2021-11-12 22:25:20,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6365848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:20,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1319383204] [2021-11-12 22:25:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:20,319 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:20,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:20,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:20,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:25:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:20,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:25:21,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:25:22,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1319383204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:22,388 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:22,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-12 22:25:22,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184978276] [2021-11-12 22:25:22,389 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:22,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:25:22,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:25:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:25:22,391 INFO L87 Difference]: Start difference. First operand 8419 states and 12087 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 7 states have internal predecessors, (77), 2 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:25:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:24,113 INFO L93 Difference]: Finished difference Result 22589 states and 33203 transitions. [2021-11-12 22:25:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:25:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 7 states have internal predecessors, (77), 2 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) Word has length 94 [2021-11-12 22:25:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:24,161 INFO L225 Difference]: With dead ends: 22589 [2021-11-12 22:25:24,161 INFO L226 Difference]: Without dead ends: 14182 [2021-11-12 22:25:24,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:25:24,183 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 228 mSDsluCounter, 6293 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 748.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 7113 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 797.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:24,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 7113 Invalid, 72 Unknown, 0 Unchecked, 10.88ms Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 797.07ms Time] [2021-11-12 22:25:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14182 states. [2021-11-12 22:25:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14182 to 8419. [2021-11-12 22:25:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8419 states, 6114 states have (on average 1.2926071311743539) internal successors, (7903), 6133 states have internal predecessors, (7903), 1912 states have call successors, (1912), 353 states have call predecessors, (1912), 392 states have return successors, (2248), 1992 states have call predecessors, (2248), 1908 states have call successors, (2248) [2021-11-12 22:25:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 12063 transitions. [2021-11-12 22:25:25,097 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 12063 transitions. Word has length 94 [2021-11-12 22:25:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:25,098 INFO L470 AbstractCegarLoop]: Abstraction has 8419 states and 12063 transitions. [2021-11-12 22:25:25,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 7 states have internal predecessors, (77), 2 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:25:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 12063 transitions. [2021-11-12 22:25:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:25:25,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:25,103 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:25,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:25,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:25,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:25,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1871827029, now seen corresponding path program 1 times [2021-11-12 22:25:25,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:25,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185945886] [2021-11-12 22:25:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:25,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:25,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:25,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:25:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:25:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:26,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:26,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:26,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185945886] [2021-11-12 22:25:26,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185945886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:26,880 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:26,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:25:26,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211650332] [2021-11-12 22:25:26,880 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:26,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:25:26,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:26,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:25:26,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:25:26,881 INFO L87 Difference]: Start difference. First operand 8419 states and 12063 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:25:27,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:27,735 INFO L93 Difference]: Finished difference Result 20911 states and 30673 transitions. [2021-11-12 22:25:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:25:27,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-12 22:25:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:27,777 INFO L225 Difference]: With dead ends: 20911 [2021-11-12 22:25:27,777 INFO L226 Difference]: Without dead ends: 12504 [2021-11-12 22:25:27,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:25:27,800 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 168 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:27,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 3066 Invalid, 14 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 116.66ms Time] [2021-11-12 22:25:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12504 states. [2021-11-12 22:25:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12504 to 7869. [2021-11-12 22:25:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7869 states, 5732 states have (on average 1.2869853454291695) internal successors, (7377), 5713 states have internal predecessors, (7377), 1744 states have call successors, (1744), 349 states have call predecessors, (1744), 392 states have return successors, (2092), 1854 states have call predecessors, (2092), 1740 states have call successors, (2092) [2021-11-12 22:25:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 11213 transitions. [2021-11-12 22:25:28,858 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 11213 transitions. Word has length 87 [2021-11-12 22:25:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:28,859 INFO L470 AbstractCegarLoop]: Abstraction has 7869 states and 11213 transitions. [2021-11-12 22:25:28,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:25:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 11213 transitions. [2021-11-12 22:25:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:25:28,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:28,863 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:28,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:29,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:29,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -205382314, now seen corresponding path program 1 times [2021-11-12 22:25:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:29,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312862256] [2021-11-12 22:25:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:29,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:29,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:29,089 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:29,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:25:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:25:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:25:30,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:25:31,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:31,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312862256] [2021-11-12 22:25:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312862256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:31,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:31,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 22:25:31,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368403447] [2021-11-12 22:25:31,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:31,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:31,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:31,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:25:31,185 INFO L87 Difference]: Start difference. First operand 7869 states and 11213 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:25:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:31,692 INFO L93 Difference]: Finished difference Result 12136 states and 17319 transitions. [2021-11-12 22:25:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:25:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-12 22:25:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:31,714 INFO L225 Difference]: With dead ends: 12136 [2021-11-12 22:25:31,714 INFO L226 Difference]: Without dead ends: 7861 [2021-11-12 22:25:31,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:25:31,726 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 2 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:31,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3254 Invalid, 20 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 72.98ms Time] [2021-11-12 22:25:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-11-12 22:25:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7861. [2021-11-12 22:25:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7861 states, 5728 states have (on average 1.2857891061452513) internal successors, (7365), 5705 states have internal predecessors, (7365), 1744 states have call successors, (1744), 349 states have call predecessors, (1744), 388 states have return successors, (2044), 1854 states have call predecessors, (2044), 1740 states have call successors, (2044) [2021-11-12 22:25:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 11153 transitions. [2021-11-12 22:25:32,467 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 11153 transitions. Word has length 87 [2021-11-12 22:25:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:32,468 INFO L470 AbstractCegarLoop]: Abstraction has 7861 states and 11153 transitions. [2021-11-12 22:25:32,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:25:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 11153 transitions. [2021-11-12 22:25:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:25:32,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:32,472 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:32,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:32,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:32,695 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:32,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2079481141, now seen corresponding path program 1 times [2021-11-12 22:25:32,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:32,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284743688] [2021-11-12 22:25:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:32,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:32,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:32,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:25:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:25:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:33,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:33,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:33,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284743688] [2021-11-12 22:25:33,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284743688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:33,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:33,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:25:33,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785000021] [2021-11-12 22:25:33,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:33,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:25:33,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:25:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:25:33,684 INFO L87 Difference]: Start difference. First operand 7861 states and 11153 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:25:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:35,106 INFO L93 Difference]: Finished difference Result 17726 states and 26073 transitions. [2021-11-12 22:25:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:25:35,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-12 22:25:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:35,144 INFO L225 Difference]: With dead ends: 17726 [2021-11-12 22:25:35,144 INFO L226 Difference]: Without dead ends: 13459 [2021-11-12 22:25:35,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:25:35,156 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 576 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 585.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 665.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:35,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1721 Invalid, 165 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [73 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 665.49ms Time] [2021-11-12 22:25:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13459 states. [2021-11-12 22:25:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13459 to 7933. [2021-11-12 22:25:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7933 states, 5800 states have (on average 1.284310344827586) internal successors, (7449), 5777 states have internal predecessors, (7449), 1744 states have call successors, (1744), 349 states have call predecessors, (1744), 388 states have return successors, (2044), 1854 states have call predecessors, (2044), 1740 states have call successors, (2044) [2021-11-12 22:25:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7933 states to 7933 states and 11237 transitions. [2021-11-12 22:25:35,861 INFO L78 Accepts]: Start accepts. Automaton has 7933 states and 11237 transitions. Word has length 87 [2021-11-12 22:25:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:35,862 INFO L470 AbstractCegarLoop]: Abstraction has 7933 states and 11237 transitions. [2021-11-12 22:25:35,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:25:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 7933 states and 11237 transitions. [2021-11-12 22:25:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 22:25:35,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:35,867 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:35,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-12 22:25:36,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:36,078 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash 390816807, now seen corresponding path program 1 times [2021-11-12 22:25:36,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:36,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720078047] [2021-11-12 22:25:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:36,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:36,081 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:36,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:25:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:25:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:25:36,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:25:37,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720078047] [2021-11-12 22:25:37,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720078047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:37,270 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:37,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:25:37,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090161436] [2021-11-12 22:25:37,270 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:37,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:25:37,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:25:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:25:37,272 INFO L87 Difference]: Start difference. First operand 7933 states and 11237 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:25:39,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:40,009 INFO L93 Difference]: Finished difference Result 15978 states and 22597 transitions. [2021-11-12 22:25:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:25:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 94 [2021-11-12 22:25:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:40,027 INFO L225 Difference]: With dead ends: 15978 [2021-11-12 22:25:40,027 INFO L226 Difference]: Without dead ends: 8051 [2021-11-12 22:25:40,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:25:40,038 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 45 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2165.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2191.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:40,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1659 Invalid, 29 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [13 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2191.63ms Time] [2021-11-12 22:25:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-11-12 22:25:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 7951. [2021-11-12 22:25:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 5812 states have (on average 1.2835512732278045) internal successors, (7460), 5789 states have internal predecessors, (7460), 1747 states have call successors, (1747), 352 states have call predecessors, (1747), 391 states have return successors, (2047), 1857 states have call predecessors, (2047), 1743 states have call successors, (2047) [2021-11-12 22:25:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 11254 transitions. [2021-11-12 22:25:40,696 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 11254 transitions. Word has length 94 [2021-11-12 22:25:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:40,696 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 11254 transitions. [2021-11-12 22:25:40,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:25:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 11254 transitions. [2021-11-12 22:25:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:25:40,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:40,699 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:25:40,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:40,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:40,915 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1118734186, now seen corresponding path program 1 times [2021-11-12 22:25:40,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:40,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171944804] [2021-11-12 22:25:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:40,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:40,917 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:40,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:25:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:25:41,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:42,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:25:43,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:43,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171944804] [2021-11-12 22:25:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171944804] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:43,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:25:43,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:25:43,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745704403] [2021-11-12 22:25:43,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:43,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:25:43,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:25:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:25:43,311 INFO L87 Difference]: Start difference. First operand 7951 states and 11254 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:25:45,383 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 [] [2021-11-12 22:25:47,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:50,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:52,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:55,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:57,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:00,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:04,434 INFO L93 Difference]: Finished difference Result 16069 states and 22828 transitions. [2021-11-12 22:26:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:26:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2021-11-12 22:26:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:04,473 INFO L225 Difference]: With dead ends: 16069 [2021-11-12 22:26:04,474 INFO L226 Difference]: Without dead ends: 16066 [2021-11-12 22:26:04,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:26:04,484 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 1472 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 372 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19388.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.40ms SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19985.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:04,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1903 Invalid, 1511 Unknown, 0 Unchecked, 19.40ms Time], IncrementalHoareTripleChecker [372 Valid, 1132 Invalid, 7 Unknown, 0 Unchecked, 19985.84ms Time] [2021-11-12 22:26:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16066 states. [2021-11-12 22:26:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16066 to 15949. [2021-11-12 22:26:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15949 states, 11638 states have (on average 1.2847568310706308) internal successors, (14952), 11571 states have internal predecessors, (14952), 3531 states have call successors, (3531), 700 states have call predecessors, (3531), 779 states have return successors, (4219), 3785 states have call predecessors, (4219), 3527 states have call successors, (4219) [2021-11-12 22:26:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 22702 transitions. [2021-11-12 22:26:05,636 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 22702 transitions. Word has length 89 [2021-11-12 22:26:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:05,636 INFO L470 AbstractCegarLoop]: Abstraction has 15949 states and 22702 transitions. [2021-11-12 22:26:05,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:26:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 22702 transitions. [2021-11-12 22:26:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 22:26:05,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:05,640 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:26:05,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:05,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:05,862 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1748979270, now seen corresponding path program 1 times [2021-11-12 22:26:05,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:05,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142119331] [2021-11-12 22:26:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:05,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:05,864 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:05,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:26:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:06,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:07,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:08,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:08,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142119331] [2021-11-12 22:26:08,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142119331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:08,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978123541] [2021-11-12 22:26:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:08,223 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:08,230 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:08,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:26:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:09,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:09,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978123541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:09,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112129533] [2021-11-12 22:26:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:09,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:09,924 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:09,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-12 22:26:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:10,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:11,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112129533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:11,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:26:11,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 13 [2021-11-12 22:26:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178755082] [2021-11-12 22:26:11,524 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:26:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:26:11,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:26:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:26:11,525 INFO L87 Difference]: Start difference. First operand 15949 states and 22702 transitions. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 10 states have internal predecessors, (79), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:26:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:14,415 INFO L93 Difference]: Finished difference Result 41006 states and 59948 transitions. [2021-11-12 22:26:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:26:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 10 states have internal predecessors, (79), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 3 states have call successors, (13) Word has length 94 [2021-11-12 22:26:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:14,540 INFO L225 Difference]: With dead ends: 41006 [2021-11-12 22:26:14,540 INFO L226 Difference]: Without dead ends: 25069 [2021-11-12 22:26:14,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:26:14,584 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 228 mSDsluCounter, 7070 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 858.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 7890 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.86ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 912.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:14,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 7890 Invalid, 220 Unknown, 0 Unchecked, 10.86ms Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 912.79ms Time] [2021-11-12 22:26:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25069 states. [2021-11-12 22:26:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25069 to 15913. [2021-11-12 22:26:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15913 states, 11602 states have (on average 1.2856404068264093) internal successors, (14916), 11571 states have internal predecessors, (14916), 3531 states have call successors, (3531), 700 states have call predecessors, (3531), 779 states have return successors, (4135), 3701 states have call predecessors, (4135), 3527 states have call successors, (4135) [2021-11-12 22:26:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15913 states to 15913 states and 22582 transitions. [2021-11-12 22:26:16,479 INFO L78 Accepts]: Start accepts. Automaton has 15913 states and 22582 transitions. Word has length 94 [2021-11-12 22:26:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:16,479 INFO L470 AbstractCegarLoop]: Abstraction has 15913 states and 22582 transitions. [2021-11-12 22:26:16,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 10 states have internal predecessors, (79), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 6 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:26:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15913 states and 22582 transitions. [2021-11-12 22:26:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:26:16,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:16,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:16,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-12 22:26:16,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:16,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:17,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:17,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash 832679025, now seen corresponding path program 1 times [2021-11-12 22:26:17,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:17,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461085030] [2021-11-12 22:26:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:17,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:17,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:17,090 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:17,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:26:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:26:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:18,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:19,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:19,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461085030] [2021-11-12 22:26:19,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461085030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:19,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:19,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-12 22:26:19,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418921956] [2021-11-12 22:26:19,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:19,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:26:19,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:19,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:26:19,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:26:19,050 INFO L87 Difference]: Start difference. First operand 15913 states and 22582 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:26:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:21,545 INFO L93 Difference]: Finished difference Result 35090 states and 51035 transitions. [2021-11-12 22:26:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:26:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) Word has length 97 [2021-11-12 22:26:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:21,765 INFO L225 Difference]: With dead ends: 35090 [2021-11-12 22:26:21,765 INFO L226 Difference]: Without dead ends: 22771 [2021-11-12 22:26:21,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:21,792 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 213 mSDsluCounter, 6369 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 840.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 7203 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 882.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:21,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 7203 Invalid, 54 Unknown, 0 Unchecked, 8.33ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 882.22ms Time] [2021-11-12 22:26:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22771 states. [2021-11-12 22:26:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22771 to 15913. [2021-11-12 22:26:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15913 states, 11602 states have (on average 1.2835717979658678) internal successors, (14892), 11571 states have internal predecessors, (14892), 3531 states have call successors, (3531), 700 states have call predecessors, (3531), 779 states have return successors, (4135), 3701 states have call predecessors, (4135), 3527 states have call successors, (4135) [2021-11-12 22:26:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15913 states to 15913 states and 22558 transitions. [2021-11-12 22:26:23,065 INFO L78 Accepts]: Start accepts. Automaton has 15913 states and 22558 transitions. Word has length 97 [2021-11-12 22:26:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:23,065 INFO L470 AbstractCegarLoop]: Abstraction has 15913 states and 22558 transitions. [2021-11-12 22:26:23,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:26:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15913 states and 22558 transitions. [2021-11-12 22:26:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:26:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:23,068 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:26:23,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:23,283 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1118058599, now seen corresponding path program 1 times [2021-11-12 22:26:23,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:23,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356520486] [2021-11-12 22:26:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:23,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:23,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:23,285 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:23,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:26:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:26:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:26:24,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:26:25,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:25,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356520486] [2021-11-12 22:26:25,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356520486] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:25,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:25,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 22:26:25,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741513713] [2021-11-12 22:26:25,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:25,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:25,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:26:25,031 INFO L87 Difference]: Start difference. First operand 15913 states and 22558 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:26:27,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:29,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:30,246 INFO L93 Difference]: Finished difference Result 31919 states and 45243 transitions. [2021-11-12 22:26:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:26:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 108 [2021-11-12 22:26:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:30,306 INFO L225 Difference]: With dead ends: 31919 [2021-11-12 22:26:30,307 INFO L226 Difference]: Without dead ends: 16015 [2021-11-12 22:26:30,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:26:30,346 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 18 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4107.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2771 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4163.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:30,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2771 Invalid, 26 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 4163.85ms Time] [2021-11-12 22:26:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16015 states. [2021-11-12 22:26:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16015 to 15922. [2021-11-12 22:26:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15922 states, 11611 states have (on average 1.2833519937989837) internal successors, (14901), 11577 states have internal predecessors, (14901), 3531 states have call successors, (3531), 700 states have call predecessors, (3531), 779 states have return successors, (4134), 3704 states have call predecessors, (4134), 3527 states have call successors, (4134) [2021-11-12 22:26:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15922 states to 15922 states and 22566 transitions. [2021-11-12 22:26:31,687 INFO L78 Accepts]: Start accepts. Automaton has 15922 states and 22566 transitions. Word has length 108 [2021-11-12 22:26:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 15922 states and 22566 transitions. [2021-11-12 22:26:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:26:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15922 states and 22566 transitions. [2021-11-12 22:26:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:26:31,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:31,689 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:26:31,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:31,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:31,911 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1967666458, now seen corresponding path program 1 times [2021-11-12 22:26:31,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:31,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678955826] [2021-11-12 22:26:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:31,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:31,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:31,913 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:31,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:26:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:26:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:26:32,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:26:33,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:33,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678955826] [2021-11-12 22:26:33,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678955826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:33,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:33,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:26:33,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808025101] [2021-11-12 22:26:33,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:33,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:33,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:33,088 INFO L87 Difference]: Start difference. First operand 15922 states and 22566 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:26:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:34,427 INFO L93 Difference]: Finished difference Result 31952 states and 45288 transitions. [2021-11-12 22:26:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2021-11-12 22:26:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:34,486 INFO L225 Difference]: With dead ends: 31952 [2021-11-12 22:26:34,486 INFO L226 Difference]: Without dead ends: 16042 [2021-11-12 22:26:34,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:34,524 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 2 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:34,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1626 Invalid, 11 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 88.43ms Time] [2021-11-12 22:26:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16042 states. [2021-11-12 22:26:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16042 to 16042. [2021-11-12 22:26:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16042 states, 11731 states have (on average 1.2804534992754242) internal successors, (15021), 11697 states have internal predecessors, (15021), 3531 states have call successors, (3531), 700 states have call predecessors, (3531), 779 states have return successors, (4134), 3704 states have call predecessors, (4134), 3527 states have call successors, (4134) [2021-11-12 22:26:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16042 states to 16042 states and 22686 transitions. [2021-11-12 22:26:35,872 INFO L78 Accepts]: Start accepts. Automaton has 16042 states and 22686 transitions. Word has length 108 [2021-11-12 22:26:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:35,872 INFO L470 AbstractCegarLoop]: Abstraction has 16042 states and 22686 transitions. [2021-11-12 22:26:35,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:26:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16042 states and 22686 transitions. [2021-11-12 22:26:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:26:35,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:35,875 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:26:35,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:36,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:36,079 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1853876661, now seen corresponding path program 1 times [2021-11-12 22:26:36,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:36,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051791176] [2021-11-12 22:26:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:36,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:36,081 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:36,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:26:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:26:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:26:37,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:26:38,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:38,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051791176] [2021-11-12 22:26:38,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051791176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:38,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [871249227] [2021-11-12 22:26:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:38,220 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:38,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:38,223 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:38,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 22:26:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:38,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:26:38,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:26:39,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:26:41,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [871249227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:41,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:26:41,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-12 22:26:41,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702567097] [2021-11-12 22:26:41,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:41,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:26:41,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:26:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:26:41,040 INFO L87 Difference]: Start difference. First operand 16042 states and 22686 transitions. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:26:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:43,594 INFO L93 Difference]: Finished difference Result 39798 states and 57329 transitions. [2021-11-12 22:26:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:43,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 122 [2021-11-12 22:26:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:43,658 INFO L225 Difference]: With dead ends: 39798 [2021-11-12 22:26:43,659 INFO L226 Difference]: Without dead ends: 23768 [2021-11-12 22:26:43,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:26:43,689 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 356 mSDsluCounter, 3727 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 620.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 4516 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.81ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 681.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:43,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 4516 Invalid, 91 Unknown, 0 Unchecked, 6.81ms Time], IncrementalHoareTripleChecker [66 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 681.28ms Time] [2021-11-12 22:26:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23768 states. [2021-11-12 22:26:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23768 to 15521. [2021-11-12 22:26:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15521 states, 11430 states have (on average 1.278740157480315) internal successors, (14616), 11400 states have internal predecessors, (14616), 3339 states have call successors, (3339), 668 states have call predecessors, (3339), 751 states have return successors, (3918), 3512 states have call predecessors, (3918), 3335 states have call successors, (3918) [2021-11-12 22:26:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15521 states to 15521 states and 21873 transitions. [2021-11-12 22:26:45,106 INFO L78 Accepts]: Start accepts. Automaton has 15521 states and 21873 transitions. Word has length 122 [2021-11-12 22:26:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:45,107 INFO L470 AbstractCegarLoop]: Abstraction has 15521 states and 21873 transitions. [2021-11-12 22:26:45,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:26:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 15521 states and 21873 transitions. [2021-11-12 22:26:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:26:45,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:45,110 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:26:45,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:45,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:45,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:45,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1582644771, now seen corresponding path program 1 times [2021-11-12 22:26:45,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:45,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719777591] [2021-11-12 22:26:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:45,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:45,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:45,518 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:45,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:26:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:46,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:26:46,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:26:46,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:26:47,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:47,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719777591] [2021-11-12 22:26:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719777591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:47,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433400075] [2021-11-12 22:26:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:47,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:47,574 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:47,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 22:26:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:48,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:26:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:26:50,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433400075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:50,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514544058] [2021-11-12 22:26:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:50,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:50,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:50,728 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:50,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 22:26:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:26:51,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:26:52,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514544058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:52,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:26:52,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 12, 12, 12, 12] total 19 [2021-11-12 22:26:52,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867770477] [2021-11-12 22:26:52,603 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:26:52,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:26:52,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:52,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:26:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:26:52,605 INFO L87 Difference]: Start difference. First operand 15521 states and 21873 transitions. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 16 states have internal predecessors, (155), 3 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (32), 6 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-12 22:26:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:56,995 INFO L93 Difference]: Finished difference Result 40681 states and 59636 transitions. [2021-11-12 22:26:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:26:56,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 16 states have internal predecessors, (155), 3 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (32), 6 states have call predecessors, (32), 3 states have call successors, (32) Word has length 120 [2021-11-12 22:26:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:57,062 INFO L225 Difference]: With dead ends: 40681 [2021-11-12 22:26:57,062 INFO L226 Difference]: Without dead ends: 25172 [2021-11-12 22:26:57,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:26:57,091 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 232 mSDsluCounter, 12192 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2096.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 12972 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.28ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2251.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:57,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 12972 Invalid, 418 Unknown, 0 Unchecked, 18.28ms Time], IncrementalHoareTripleChecker [4 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 2251.16ms Time] [2021-11-12 22:26:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25172 states. [2021-11-12 22:26:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25172 to 15497. [2021-11-12 22:26:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15497 states, 11406 states have (on average 1.2793266701735928) internal successors, (14592), 11448 states have internal predecessors, (14592), 3339 states have call successors, (3339), 668 states have call predecessors, (3339), 751 states have return successors, (3846), 3440 states have call predecessors, (3846), 3335 states have call successors, (3846) [2021-11-12 22:26:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15497 states to 15497 states and 21777 transitions. [2021-11-12 22:26:58,702 INFO L78 Accepts]: Start accepts. Automaton has 15497 states and 21777 transitions. Word has length 120 [2021-11-12 22:26:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:58,702 INFO L470 AbstractCegarLoop]: Abstraction has 15497 states and 21777 transitions. [2021-11-12 22:26:58,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 16 states have internal predecessors, (155), 3 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (32), 6 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-12 22:26:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15497 states and 21777 transitions. [2021-11-12 22:26:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:26:58,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:58,704 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:26:58,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:58,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:59,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-12 22:26:59,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:59,305 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2053204873, now seen corresponding path program 1 times [2021-11-12 22:26:59,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:59,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614138043] [2021-11-12 22:26:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:59,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:59,307 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:59,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 22:26:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:26:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:27:00,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:27:02,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:02,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614138043] [2021-11-12 22:27:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614138043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:02,022 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:02,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 13 [2021-11-12 22:27:02,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172559757] [2021-11-12 22:27:02,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:27:02,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:27:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:27:02,024 INFO L87 Difference]: Start difference. First operand 15497 states and 21777 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 10 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:27:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:05,081 INFO L93 Difference]: Finished difference Result 34148 states and 49144 transitions. [2021-11-12 22:27:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:27:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 10 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) Word has length 104 [2021-11-12 22:27:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:05,145 INFO L225 Difference]: With dead ends: 34148 [2021-11-12 22:27:05,146 INFO L226 Difference]: Without dead ends: 22004 [2021-11-12 22:27:05,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:27:05,173 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 216 mSDsluCounter, 7137 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1128.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 7964 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1191.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:05,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 7964 Invalid, 131 Unknown, 0 Unchecked, 8.49ms Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 1191.29ms Time] [2021-11-12 22:27:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22004 states. [2021-11-12 22:27:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22004 to 15329. [2021-11-12 22:27:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15329 states, 11318 states have (on average 1.2793779819756141) internal successors, (14480), 11384 states have internal predecessors, (14480), 3267 states have call successors, (3267), 660 states have call predecessors, (3267), 743 states have return successors, (3726), 3344 states have call predecessors, (3726), 3263 states have call successors, (3726) [2021-11-12 22:27:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15329 states to 15329 states and 21473 transitions. [2021-11-12 22:27:06,588 INFO L78 Accepts]: Start accepts. Automaton has 15329 states and 21473 transitions. Word has length 104 [2021-11-12 22:27:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:06,588 INFO L470 AbstractCegarLoop]: Abstraction has 15329 states and 21473 transitions. [2021-11-12 22:27:06,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 10 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:27:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15329 states and 21473 transitions. [2021-11-12 22:27:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:27:06,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:06,590 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:27:06,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:06,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:06,791 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1117139730, now seen corresponding path program 1 times [2021-11-12 22:27:06,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:06,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566387122] [2021-11-12 22:27:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:06,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:06,794 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:06,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:27:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:27:20,481 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:27:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:27:34,639 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 22:27:34,639 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:27:34,640 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:27:34,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:34,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:34,865 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:34,868 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:27:34,992 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 22:27:34,997 INFO L158 Benchmark]: Toolchain (without parser) took 285267.58ms. Allocated memory was 75.5MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 52.7MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2021-11-12 22:27:34,997 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 75.5MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:27:34,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2502.92ms. Allocated memory was 75.5MB in the beginning and 151.0MB in the end (delta: 75.5MB). Free memory was 52.5MB in the beginning and 80.8MB in the end (delta: -28.3MB). Peak memory consumption was 76.5MB. Max. memory is 16.1GB. [2021-11-12 22:27:34,998 INFO L158 Benchmark]: Boogie Procedure Inliner took 190.36ms. Allocated memory is still 151.0MB. Free memory was 80.8MB in the beginning and 71.4MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:27:34,998 INFO L158 Benchmark]: Boogie Preprocessor took 188.15ms. Allocated memory is still 151.0MB. Free memory was 71.4MB in the beginning and 60.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:27:34,999 INFO L158 Benchmark]: RCFGBuilder took 15805.12ms. Allocated memory was 151.0MB in the beginning and 218.1MB in the end (delta: 67.1MB). Free memory was 60.9MB in the beginning and 61.8MB in the end (delta: -939.3kB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. [2021-11-12 22:27:35,002 INFO L158 Benchmark]: TraceAbstraction took 266575.02ms. Allocated memory was 218.1MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 61.8MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 980.3MB. Max. memory is 16.1GB. [2021-11-12 22:27:35,004 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 75.5MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2502.92ms. Allocated memory was 75.5MB in the beginning and 151.0MB in the end (delta: 75.5MB). Free memory was 52.5MB in the beginning and 80.8MB in the end (delta: -28.3MB). Peak memory consumption was 76.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 190.36ms. Allocated memory is still 151.0MB. Free memory was 80.8MB in the beginning and 71.4MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 188.15ms. Allocated memory is still 151.0MB. Free memory was 71.4MB in the beginning and 60.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 15805.12ms. Allocated memory was 151.0MB in the beginning and 218.1MB in the end (delta: 67.1MB). Free memory was 60.9MB in the beginning and 61.8MB in the end (delta: -939.3kB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. * TraceAbstraction took 266575.02ms. Allocated memory was 218.1MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 61.8MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 980.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 22:27:35,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7566b1-9670-4446-9745-5886b4fc5472/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null