./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.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_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/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_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/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_766bc108-6ce2-4b64-80e2-ca61564ffca4/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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:27:58,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:27:58,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:27:58,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:27:58,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:27:58,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:27:58,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:27:58,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:27:58,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:27:58,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:27:58,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:27:58,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:27:58,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:27:58,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:27:58,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:27:58,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:27:58,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:27:58,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:27:58,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:27:58,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:27:58,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:27:58,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:27:58,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:27:58,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:27:58,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:27:58,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:27:58,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:27:58,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:27:58,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:27:58,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:27:58,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:27:58,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:27:58,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:27:58,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:27:58,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:27:58,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:27:58,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:27:58,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:27:58,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:27:58,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:27:58,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:27:58,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:27:58,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:27:58,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:27:58,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:27:58,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:27:58,829 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:27:58,829 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:27:58,829 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:27:58,830 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:27:58,837 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:27:58,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:27:58,839 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:27:58,839 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:27:58,839 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:27:58,840 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:27:58,840 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:27:58,840 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:27:58,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:27:58,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:27:58,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:27:58,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:27:58,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:27:58,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:27:58,843 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:27:58,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:27:58,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:27:58,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:27:58,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:27:58,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:27:58,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:58,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:27:58,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:27:58,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:27:58,846 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:27:58,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:27:58,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:27:58,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:27:58,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:27:58,848 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2021-11-13 02:27:59,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:27:59,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:27:59,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:27:59,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:27:59,227 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:27:59,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-13 02:27:59,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/be8739c0b/6154984c13d44f25b6111bf633e6f333/FLAG621b161bd [2021-11-13 02:28:00,477 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:00,479 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-13 02:28:00,542 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/be8739c0b/6154984c13d44f25b6111bf633e6f333/FLAG621b161bd [2021-11-13 02:28:00,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/be8739c0b/6154984c13d44f25b6111bf633e6f333 [2021-11-13 02:28:00,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:00,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:00,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:00,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:00,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:00,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:00" (1/1) ... [2021-11-13 02:28:00,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7488220b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:00, skipping insertion in model container [2021-11-13 02:28:00,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:00" (1/1) ... [2021-11-13 02:28:00,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:00,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:02,289 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-13 02:28:02,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:02,938 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:28:02,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@715a6cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:02, skipping insertion in model container [2021-11-13 02:28:02,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:02,940 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:28:02,943 INFO L158 Benchmark]: Toolchain (without parser) took 2128.79ms. Allocated memory was 88.1MB in the beginning and 111.1MB in the end (delta: 23.1MB). Free memory was 61.7MB in the beginning and 61.4MB in the end (delta: 262.2kB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2021-11-13 02:28:02,943 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 88.1MB. Free memory was 57.2MB in the beginning and 57.2MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:28:02,946 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2125.69ms. Allocated memory was 88.1MB in the beginning and 111.1MB in the end (delta: 23.1MB). Free memory was 61.4MB in the beginning and 61.4MB in the end (delta: -38.5kB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. [2021-11-13 02:28:02,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 88.1MB. Free memory was 57.2MB in the beginning and 57.2MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2125.69ms. Allocated memory was 88.1MB in the beginning and 111.1MB in the end (delta: 23.1MB). Free memory was 61.4MB in the beginning and 61.4MB in the end (delta: -38.5kB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5815]: 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/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_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/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_766bc108-6ce2-4b64-80e2-ca61564ffca4/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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:28:05,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:28:05,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:28:05,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:28:05,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:28:05,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:28:05,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:28:05,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:28:05,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:28:05,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:28:05,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:28:05,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:28:05,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:28:05,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:28:05,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:28:05,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:28:05,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:28:05,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:28:05,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:28:05,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:28:05,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:28:05,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:28:05,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:28:05,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:28:05,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:28:05,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:28:05,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:28:05,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:28:05,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:28:05,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:28:05,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:28:05,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:28:05,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:28:05,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:28:05,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:28:05,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:28:05,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:28:05,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:28:05,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:28:05,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:28:05,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:28:05,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:28:05,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:28:05,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:28:05,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:28:05,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:28:05,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:28:05,840 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:28:05,840 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:28:05,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:28:05,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:28:05,841 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:28:05,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:28:05,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:28:05,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:28:05,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:28:05,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:28:05,843 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:28:05,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:28:05,843 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:28:05,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:28:05,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:28:05,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:28:05,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:28:05,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:28:05,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:28:05,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:05,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:28:05,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:28:05,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:28:05,846 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:28:05,846 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:05,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:28:05,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:28:05,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:28:05,847 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2021-11-13 02:28:06,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:28:06,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:28:06,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:28:06,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:28:06,387 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:28:06,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-13 02:28:06,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/8d8d33b4e/f18c989281d748e7b690d09dac79815f/FLAG9192e626a [2021-11-13 02:28:07,711 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:07,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-13 02:28:07,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/8d8d33b4e/f18c989281d748e7b690d09dac79815f/FLAG9192e626a [2021-11-13 02:28:08,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/data/8d8d33b4e/f18c989281d748e7b690d09dac79815f [2021-11-13 02:28:08,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:08,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:08,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:08,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:08,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:08,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:08" (1/1) ... [2021-11-13 02:28:08,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3e975a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:08, skipping insertion in model container [2021-11-13 02:28:08,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:08" (1/1) ... [2021-11-13 02:28:08,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:08,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:09,364 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-13 02:28:09,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:10,042 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:28:10,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:10,321 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-13 02:28:10,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:10,547 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:28:10,797 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_766bc108-6ce2-4b64-80e2-ca61564ffca4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-13 02:28:10,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:11,072 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:28:11,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11 WrapperNode [2021-11-13 02:28:11,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:11,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:11,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:28:11,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:28:11,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:11,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:28:11,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:28:11,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:28:11,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:28:11,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:28:11,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:28:11,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:28:11,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:11,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:28:11,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:28:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-13 02:28:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-13 02:28:11,794 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-13 02:28:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-13 02:28:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2021-11-13 02:28:11,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2021-11-13 02:28:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:28:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2021-11-13 02:28:11,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2021-11-13 02:28:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-13 02:28:11,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-13 02:28:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:28:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:28:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 02:28:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 02:28:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 02:28:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-13 02:28:11,798 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-13 02:28:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 02:28:11,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 02:28:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-13 02:28:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-13 02:28:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-13 02:28:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-13 02:28:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-13 02:28:11,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-13 02:28:11,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 02:28:11,800 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 02:28:11,800 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 02:28:11,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 02:28:11,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 02:28:11,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 02:28:11,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-13 02:28:11,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-13 02:28:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2021-11-13 02:28:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2021-11-13 02:28:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2021-11-13 02:28:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2021-11-13 02:28:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2021-11-13 02:28:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2021-11-13 02:28:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 02:28:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 02:28:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 02:28:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 02:28:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 02:28:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 02:28:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 02:28:11,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 02:28:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 02:28:11,805 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 02:28:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:28:11,806 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:28:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-13 02:28:11,806 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-13 02:28:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:28:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 02:28:11,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 02:28:11,807 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2021-11-13 02:28:11,807 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2021-11-13 02:28:11,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 02:28:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 02:28:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:28:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:28:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 02:28:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 02:28:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:28:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:28:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 02:28:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 02:28:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 02:28:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-13 02:28:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-13 02:28:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:28:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-13 02:28:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-13 02:28:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-13 02:28:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-13 02:28:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-11-13 02:28:11,812 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-11-13 02:28:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:28:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:28:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 02:28:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2021-11-13 02:28:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2021-11-13 02:28:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:28:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:28:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:28:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2021-11-13 02:28:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2021-11-13 02:28:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:28:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:28:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 02:28:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-13 02:28:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-13 02:28:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-13 02:28:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-13 02:28:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-11-13 02:28:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-11-13 02:28:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-13 02:28:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-13 02:28:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-13 02:28:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-13 02:28:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2021-11-13 02:28:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2021-11-13 02:28:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 02:28:11,818 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2021-11-13 02:28:11,818 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2021-11-13 02:28:11,818 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-13 02:28:11,818 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-13 02:28:11,819 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2021-11-13 02:28:11,819 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2021-11-13 02:28:11,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 02:28:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 02:28:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:28:11,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:28:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2021-11-13 02:28:11,821 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2021-11-13 02:28:14,941 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 02:28:26,680 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 02:28:40,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:28:40,961 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:28:40,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:40 BoogieIcfgContainer [2021-11-13 02:28:40,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:28:40,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:28:40,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:28:40,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:28:40,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:28:08" (1/3) ... [2021-11-13 02:28:40,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1148b63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:40, skipping insertion in model container [2021-11-13 02:28:40,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (2/3) ... [2021-11-13 02:28:40,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1148b63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:40, skipping insertion in model container [2021-11-13 02:28:40,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:40" (3/3) ... [2021-11-13 02:28:40,997 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-13 02:28:41,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:28:41,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:28:41,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:28:41,066 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:28:41,066 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:28:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 653 states, 477 states have (on average 1.329140461215933) internal successors, (634), 496 states have internal predecessors, (634), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2021-11-13 02:28:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 02:28:41,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:41,110 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 02:28:41,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash -583991121, now seen corresponding path program 1 times [2021-11-13 02:28:41,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:41,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163942619] [2021-11-13 02:28:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:41,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:41,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:41,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:41,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:28:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:41,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:28:41,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:28:42,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:28:42,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:42,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163942619] [2021-11-13 02:28:42,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163942619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:42,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:42,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:28:42,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234448232] [2021-11-13 02:28:42,441 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:42,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:42,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:42,480 INFO L87 Difference]: Start difference. First operand has 653 states, 477 states have (on average 1.329140461215933) internal successors, (634), 496 states have internal predecessors, (634), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:44,598 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 [] [2021-11-13 02:28:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:47,786 INFO L93 Difference]: Finished difference Result 2528 states and 3521 transitions. [2021-11-13 02:28:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:47,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-13 02:28:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:47,831 INFO L225 Difference]: With dead ends: 2528 [2021-11-13 02:28:47,831 INFO L226 Difference]: Without dead ends: 1847 [2021-11-13 02:28:47,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:47,845 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 2280 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 250 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4650.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2280 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.52ms SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5016.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:47,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2280 Valid, 2573 Invalid, 517 Unknown, 0 Unchecked, 32.52ms Time], IncrementalHoareTripleChecker [250 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 5016.58ms Time] [2021-11-13 02:28:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-11-13 02:28:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1847. [2021-11-13 02:28:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1363 states have (on average 1.3125458547322084) internal successors, (1789), 1388 states have internal predecessors, (1789), 360 states have call successors, (360), 124 states have call predecessors, (360), 123 states have return successors, (355), 352 states have call predecessors, (355), 355 states have call successors, (355) [2021-11-13 02:28:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2504 transitions. [2021-11-13 02:28:48,041 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2504 transitions. Word has length 28 [2021-11-13 02:28:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:48,042 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 2504 transitions. [2021-11-13 02:28:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:48,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2504 transitions. [2021-11-13 02:28:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 02:28:48,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:48,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:48,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:48,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:48,265 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1373222682, now seen corresponding path program 1 times [2021-11-13 02:28:48,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:48,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323564939] [2021-11-13 02:28:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:48,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:48,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:48,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:48,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:28:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:50,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:50,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:50,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323564939] [2021-11-13 02:28:50,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323564939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:50,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:50,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 02:28:50,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406053240] [2021-11-13 02:28:50,488 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:50,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:50,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:50,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:50,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:50,490 INFO L87 Difference]: Start difference. First operand 1847 states and 2504 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:50,923 INFO L93 Difference]: Finished difference Result 5514 states and 7514 transitions. [2021-11-13 02:28:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-11-13 02:28:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:50,957 INFO L225 Difference]: With dead ends: 5514 [2021-11-13 02:28:50,957 INFO L226 Difference]: Without dead ends: 3681 [2021-11-13 02:28:50,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:50,968 INFO L933 BasicCegarLoop]: 1296 mSDtfsCounter, 851 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.13ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 235.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:50,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 2976 Invalid, 34 Unknown, 0 Unchecked, 12.13ms Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 235.43ms Time] [2021-11-13 02:28:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-11-13 02:28:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3669. [2021-11-13 02:28:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3669 states, 2711 states have (on average 1.3113242345997786) internal successors, (3555), 2757 states have internal predecessors, (3555), 712 states have call successors, (712), 246 states have call predecessors, (712), 245 states have return successors, (728), 701 states have call predecessors, (728), 707 states have call successors, (728) [2021-11-13 02:28:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 4995 transitions. [2021-11-13 02:28:51,210 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 4995 transitions. Word has length 38 [2021-11-13 02:28:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:51,210 INFO L470 AbstractCegarLoop]: Abstraction has 3669 states and 4995 transitions. [2021-11-13 02:28:51,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 4995 transitions. [2021-11-13 02:28:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 02:28:51,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:51,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:51,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:51,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:51,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:51,428 INFO L85 PathProgramCache]: Analyzing trace with hash 379434109, now seen corresponding path program 1 times [2021-11-13 02:28:51,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:51,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135413691] [2021-11-13 02:28:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:51,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:51,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:51,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:28:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:52,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:53,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:53,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:53,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135413691] [2021-11-13 02:28:53,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135413691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:53,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 02:28:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758108027] [2021-11-13 02:28:53,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:53,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:53,615 INFO L87 Difference]: Start difference. First operand 3669 states and 4995 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:54,467 INFO L93 Difference]: Finished difference Result 3671 states and 4996 transitions. [2021-11-13 02:28:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-11-13 02:28:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:54,497 INFO L225 Difference]: With dead ends: 3671 [2021-11-13 02:28:54,497 INFO L226 Difference]: Without dead ends: 3668 [2021-11-13 02:28:54,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:54,503 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 1427 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 501.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.60ms SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 607.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:54,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1427 Valid, 861 Invalid, 244 Unknown, 0 Unchecked, 8.60ms Time], IncrementalHoareTripleChecker [243 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 607.95ms Time] [2021-11-13 02:28:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2021-11-13 02:28:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3668. [2021-11-13 02:28:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 2711 states have (on average 1.3109553670232386) internal successors, (3554), 2756 states have internal predecessors, (3554), 711 states have call successors, (711), 246 states have call predecessors, (711), 245 states have return successors, (728), 701 states have call predecessors, (728), 707 states have call successors, (728) [2021-11-13 02:28:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 4993 transitions. [2021-11-13 02:28:54,767 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 4993 transitions. Word has length 39 [2021-11-13 02:28:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:54,768 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 4993 transitions. [2021-11-13 02:28:54,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 4993 transitions. [2021-11-13 02:28:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 02:28:54,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:54,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:54,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:54,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:54,996 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:54,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1122775351, now seen corresponding path program 1 times [2021-11-13 02:28:54,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:54,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434180717] [2021-11-13 02:28:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:54,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:55,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:55,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:28:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:28:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:56,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:56,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:56,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434180717] [2021-11-13 02:28:56,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434180717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:56,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:56,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 02:28:56,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199563656] [2021-11-13 02:28:56,676 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:56,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:56,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:56,678 INFO L87 Difference]: Start difference. First operand 3668 states and 4993 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 02:28:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:56,871 INFO L93 Difference]: Finished difference Result 3670 states and 4994 transitions. [2021-11-13 02:28:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-11-13 02:28:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:56,900 INFO L225 Difference]: With dead ends: 3670 [2021-11-13 02:28:56,900 INFO L226 Difference]: Without dead ends: 3667 [2021-11-13 02:28:56,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:56,905 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 829 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:56,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 859 Invalid, 1 Unknown, 0 Unchecked, 4.14ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 5.69ms Time] [2021-11-13 02:28:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2021-11-13 02:28:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3667. [2021-11-13 02:28:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 2711 states have (on average 1.3105864994466987) internal successors, (3553), 2755 states have internal predecessors, (3553), 710 states have call successors, (710), 246 states have call predecessors, (710), 245 states have return successors, (728), 701 states have call predecessors, (728), 707 states have call successors, (728) [2021-11-13 02:28:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 4991 transitions. [2021-11-13 02:28:57,168 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 4991 transitions. Word has length 40 [2021-11-13 02:28:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:57,170 INFO L470 AbstractCegarLoop]: Abstraction has 3667 states and 4991 transitions. [2021-11-13 02:28:57,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 02:28:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 4991 transitions. [2021-11-13 02:28:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 02:28:57,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:57,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:57,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:57,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:57,399 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -446623488, now seen corresponding path program 1 times [2021-11-13 02:28:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:57,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772219461] [2021-11-13 02:28:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:57,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:57,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:57,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:57,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:28:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:28:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:58,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:28:59,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:59,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772219461] [2021-11-13 02:28:59,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772219461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:59,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:59,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 02:28:59,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35709154] [2021-11-13 02:28:59,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:59,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:59,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:59,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:59,012 INFO L87 Difference]: Start difference. First operand 3667 states and 4991 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 02:28:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:59,198 INFO L93 Difference]: Finished difference Result 3669 states and 4992 transitions. [2021-11-13 02:28:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:59,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-11-13 02:28:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:59,227 INFO L225 Difference]: With dead ends: 3669 [2021-11-13 02:28:59,227 INFO L226 Difference]: Without dead ends: 3666 [2021-11-13 02:28:59,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:59,231 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 826 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:59,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 857 Invalid, 1 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 5.22ms Time] [2021-11-13 02:28:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-11-13 02:28:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3666. [2021-11-13 02:28:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2711 states have (on average 1.3102176318701586) internal successors, (3552), 2754 states have internal predecessors, (3552), 709 states have call successors, (709), 246 states have call predecessors, (709), 245 states have return successors, (728), 701 states have call predecessors, (728), 707 states have call successors, (728) [2021-11-13 02:28:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 4989 transitions. [2021-11-13 02:28:59,546 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 4989 transitions. Word has length 41 [2021-11-13 02:28:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:59,547 INFO L470 AbstractCegarLoop]: Abstraction has 3666 states and 4989 transitions. [2021-11-13 02:28:59,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 02:28:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 4989 transitions. [2021-11-13 02:28:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 02:28:59,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:59,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:59,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:59,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:59,764 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -960747348, now seen corresponding path program 1 times [2021-11-13 02:28:59,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:59,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482463083] [2021-11-13 02:28:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:59,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:59,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:59,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:59,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:29:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:00,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:29:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:29:00,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:29:01,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:01,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482463083] [2021-11-13 02:29:01,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482463083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:01,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:01,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 02:29:01,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164156256] [2021-11-13 02:29:01,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:01,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:29:01,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:01,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:29:01,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:29:01,344 INFO L87 Difference]: Start difference. First operand 3666 states and 4989 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 02:29:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:01,520 INFO L93 Difference]: Finished difference Result 3668 states and 4990 transitions. [2021-11-13 02:29:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:29:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-11-13 02:29:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:01,547 INFO L225 Difference]: With dead ends: 3668 [2021-11-13 02:29:01,547 INFO L226 Difference]: Without dead ends: 3656 [2021-11-13 02:29:01,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:29:01,551 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 823 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:01,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 4.40ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:29:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-11-13 02:29:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3656. [2021-11-13 02:29:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 2702 states have (on average 1.3097705403404885) internal successors, (3539), 2744 states have internal predecessors, (3539), 708 states have call successors, (708), 246 states have call predecessors, (708), 245 states have return successors, (728), 701 states have call predecessors, (728), 707 states have call successors, (728) [2021-11-13 02:29:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 4975 transitions. [2021-11-13 02:29:01,857 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 4975 transitions. Word has length 42 [2021-11-13 02:29:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 3656 states and 4975 transitions. [2021-11-13 02:29:01,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 02:29:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 4975 transitions. [2021-11-13 02:29:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 02:29:01,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:01,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-13 02:29:01,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:02,092 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -64547374, now seen corresponding path program 1 times [2021-11-13 02:29:02,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:02,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886429833] [2021-11-13 02:29:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:02,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:02,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:02,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:29:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:29:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:29:03,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:29:03,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:03,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886429833] [2021-11-13 02:29:03,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886429833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:03,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:03,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:29:03,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789999786] [2021-11-13 02:29:03,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:03,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:29:03,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:03,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:29:03,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:29:03,824 INFO L87 Difference]: Start difference. First operand 3656 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-11-13 02:29:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:04,354 INFO L93 Difference]: Finished difference Result 8434 states and 11360 transitions. [2021-11-13 02:29:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:29:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 82 [2021-11-13 02:29:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:04,394 INFO L225 Difference]: With dead ends: 8434 [2021-11-13 02:29:04,394 INFO L226 Difference]: Without dead ends: 4792 [2021-11-13 02:29:04,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:29:04,412 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 259 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:04,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1776 Invalid, 20 Unknown, 0 Unchecked, 6.45ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 230.31ms Time] [2021-11-13 02:29:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2021-11-13 02:29:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 4784. [2021-11-13 02:29:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4784 states, 3554 states have (on average 1.2934721440630277) internal successors, (4597), 3602 states have internal predecessors, (4597), 886 states have call successors, (886), 344 states have call predecessors, (886), 343 states have return successors, (906), 879 states have call predecessors, (906), 885 states have call successors, (906) [2021-11-13 02:29:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4784 states to 4784 states and 6389 transitions. [2021-11-13 02:29:04,817 INFO L78 Accepts]: Start accepts. Automaton has 4784 states and 6389 transitions. Word has length 82 [2021-11-13 02:29:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:04,818 INFO L470 AbstractCegarLoop]: Abstraction has 4784 states and 6389 transitions. [2021-11-13 02:29:04,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-11-13 02:29:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4784 states and 6389 transitions. [2021-11-13 02:29:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 02:29:04,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:04,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:04,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:05,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:05,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash 66281665, now seen corresponding path program 1 times [2021-11-13 02:29:05,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:05,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275007736] [2021-11-13 02:29:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:05,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:05,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:05,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:05,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:29:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:29:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:29:06,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:29:06,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:06,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275007736] [2021-11-13 02:29:06,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275007736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:06,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:06,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:29:06,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83357238] [2021-11-13 02:29:06,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:06,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:06,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:06,751 INFO L87 Difference]: Start difference. First operand 4784 states and 6389 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 02:29:08,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:11,223 INFO L93 Difference]: Finished difference Result 13230 states and 17508 transitions. [2021-11-13 02:29:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:29:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 98 [2021-11-13 02:29:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:11,307 INFO L225 Difference]: With dead ends: 13230 [2021-11-13 02:29:11,307 INFO L226 Difference]: Without dead ends: 8460 [2021-11-13 02:29:11,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:11,332 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 931 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3695.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.73ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3843.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:11,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 2690 Invalid, 229 Unknown, 0 Unchecked, 13.73ms Time], IncrementalHoareTripleChecker [19 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 3843.50ms Time] [2021-11-13 02:29:11,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8460 states. [2021-11-13 02:29:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8460 to 8444. [2021-11-13 02:29:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8444 states, 6362 states have (on average 1.2942470921093996) internal successors, (8234), 6446 states have internal predecessors, (8234), 1410 states have call successors, (1410), 672 states have call predecessors, (1410), 671 states have return successors, (1430), 1397 states have call predecessors, (1430), 1409 states have call successors, (1430) [2021-11-13 02:29:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8444 states to 8444 states and 11074 transitions. [2021-11-13 02:29:12,100 INFO L78 Accepts]: Start accepts. Automaton has 8444 states and 11074 transitions. Word has length 98 [2021-11-13 02:29:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:12,101 INFO L470 AbstractCegarLoop]: Abstraction has 8444 states and 11074 transitions. [2021-11-13 02:29:12,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 02:29:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8444 states and 11074 transitions. [2021-11-13 02:29:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 02:29:12,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:12,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-11-13 02:29:12,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:12,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:12,348 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1582638069, now seen corresponding path program 1 times [2021-11-13 02:29:12,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:12,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431410097] [2021-11-13 02:29:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:12,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:12,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:12,351 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:12,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:29:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:29:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:29:14,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:29:15,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:15,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431410097] [2021-11-13 02:29:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431410097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:15,053 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:29:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887533434] [2021-11-13 02:29:15,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:15,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:29:15,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:29:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:29:15,055 INFO L87 Difference]: Start difference. First operand 8444 states and 11074 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 6 states have internal predecessors, (91), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 02:29:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:15,706 INFO L93 Difference]: Finished difference Result 17054 states and 22455 transitions. [2021-11-13 02:29:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:29:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 6 states have internal predecessors, (91), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 121 [2021-11-13 02:29:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:15,749 INFO L225 Difference]: With dead ends: 17054 [2021-11-13 02:29:15,749 INFO L226 Difference]: Without dead ends: 8624 [2021-11-13 02:29:15,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:29:15,781 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 10 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3401 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.52ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:15,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3401 Invalid, 12 Unknown, 0 Unchecked, 9.82ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 87.52ms Time] [2021-11-13 02:29:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2021-11-13 02:29:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 8546. [2021-11-13 02:29:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 6434 states have (on average 1.2928193969536836) internal successors, (8318), 6524 states have internal predecessors, (8318), 1422 states have call successors, (1422), 672 states have call predecessors, (1422), 689 states have return successors, (1532), 1421 states have call predecessors, (1532), 1421 states have call successors, (1532) [2021-11-13 02:29:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 11272 transitions. [2021-11-13 02:29:16,492 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 11272 transitions. Word has length 121 [2021-11-13 02:29:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:16,493 INFO L470 AbstractCegarLoop]: Abstraction has 8546 states and 11272 transitions. [2021-11-13 02:29:16,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 6 states have internal predecessors, (91), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 02:29:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 11272 transitions. [2021-11-13 02:29:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:29:16,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:16,507 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-11-13 02:29:16,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:16,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:16,730 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:16,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:16,730 INFO L85 PathProgramCache]: Analyzing trace with hash -145557675, now seen corresponding path program 1 times [2021-11-13 02:29:16,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:16,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10717036] [2021-11-13 02:29:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:16,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:16,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:16,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:29:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:29:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:29:18,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:29:19,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:19,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10717036] [2021-11-13 02:29:19,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10717036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:19,378 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:19,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-13 02:29:19,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579616022] [2021-11-13 02:29:19,379 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:29:19,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:29:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:29:19,380 INFO L87 Difference]: Start difference. First operand 8546 states and 11272 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 6 states have internal predecessors, (89), 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) [2021-11-13 02:29:21,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:30,224 INFO L93 Difference]: Finished difference Result 25604 states and 35277 transitions. [2021-11-13 02:29:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 02:29:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 6 states have internal predecessors, (89), 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 127 [2021-11-13 02:29:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:30,308 INFO L225 Difference]: With dead ends: 25604 [2021-11-13 02:29:30,308 INFO L226 Difference]: Without dead ends: 17072 [2021-11-13 02:29:30,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:29:30,341 INFO L933 BasicCegarLoop]: 1655 mSDtfsCounter, 3069 mSDsluCounter, 8043 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 441 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8368.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3185 SdHoareTripleChecker+Valid, 9698 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.03ms SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9054.81ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:30,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3185 Valid, 9698 Invalid, 1096 Unknown, 0 Unchecked, 41.03ms Time], IncrementalHoareTripleChecker [441 Valid, 654 Invalid, 1 Unknown, 0 Unchecked, 9054.81ms Time] [2021-11-13 02:29:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2021-11-13 02:29:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 8546. [2021-11-13 02:29:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 6434 states have (on average 1.2923531240285981) internal successors, (8315), 6524 states have internal predecessors, (8315), 1422 states have call successors, (1422), 672 states have call predecessors, (1422), 689 states have return successors, (1532), 1421 states have call predecessors, (1532), 1421 states have call successors, (1532) [2021-11-13 02:29:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 11269 transitions. [2021-11-13 02:29:31,353 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 11269 transitions. Word has length 127 [2021-11-13 02:29:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:31,354 INFO L470 AbstractCegarLoop]: Abstraction has 8546 states and 11269 transitions. [2021-11-13 02:29:31,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 6 states have internal predecessors, (89), 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) [2021-11-13 02:29:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 11269 transitions. [2021-11-13 02:29:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 02:29:31,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:31,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-13 02:29:31,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-13 02:29:31,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:31,591 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 956999624, now seen corresponding path program 1 times [2021-11-13 02:29:31,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:31,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475012383] [2021-11-13 02:29:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:31,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:31,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:31,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:31,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:29:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:29:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:29:33,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:29:33,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:33,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475012383] [2021-11-13 02:29:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475012383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:33,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:33,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 02:29:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264657855] [2021-11-13 02:29:33,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:33,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:33,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:33,506 INFO L87 Difference]: Start difference. First operand 8546 states and 11269 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:29:35,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:36,782 INFO L93 Difference]: Finished difference Result 24037 states and 31839 transitions. [2021-11-13 02:29:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:29:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-13 02:29:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:36,846 INFO L225 Difference]: With dead ends: 24037 [2021-11-13 02:29:36,846 INFO L226 Difference]: Without dead ends: 15505 [2021-11-13 02:29:36,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:36,875 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 938 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2240.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 3906 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.98ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2282.96ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:36,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 3906 Invalid, 61 Unknown, 0 Unchecked, 7.98ms Time], IncrementalHoareTripleChecker [31 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2282.96ms Time] [2021-11-13 02:29:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15505 states. [2021-11-13 02:29:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15505 to 13680. [2021-11-13 02:29:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13680 states, 10314 states have (on average 1.289897227070002) internal successors, (13304), 10460 states have internal predecessors, (13304), 2255 states have call successors, (2255), 1084 states have call predecessors, (2255), 1110 states have return successors, (2422), 2242 states have call predecessors, (2422), 2254 states have call successors, (2422) [2021-11-13 02:29:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13680 states to 13680 states and 17981 transitions. [2021-11-13 02:29:38,114 INFO L78 Accepts]: Start accepts. Automaton has 13680 states and 17981 transitions. Word has length 133 [2021-11-13 02:29:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:38,115 INFO L470 AbstractCegarLoop]: Abstraction has 13680 states and 17981 transitions. [2021-11-13 02:29:38,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:29:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 13680 states and 17981 transitions. [2021-11-13 02:29:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:29:38,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:38,138 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:38,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-13 02:29:38,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:38,356 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 585631656, now seen corresponding path program 1 times [2021-11-13 02:29:38,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:38,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219441208] [2021-11-13 02:29:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:38,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:38,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:38,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:38,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:29:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:29:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:29:39,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:29:40,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:40,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219441208] [2021-11-13 02:29:40,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219441208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:40,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:40,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-13 02:29:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115858693] [2021-11-13 02:29:40,392 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:29:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:29:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:29:40,394 INFO L87 Difference]: Start difference. First operand 13680 states and 17981 transitions. Second operand has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:29:42,509 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 [] [2021-11-13 02:29:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:53,598 INFO L93 Difference]: Finished difference Result 37665 states and 50213 transitions. [2021-11-13 02:29:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 02:29:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 145 [2021-11-13 02:29:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:53,708 INFO L225 Difference]: With dead ends: 37665 [2021-11-13 02:29:53,709 INFO L226 Difference]: Without dead ends: 23999 [2021-11-13 02:29:53,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=415, Invalid=1225, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 02:29:53,760 INFO L933 BasicCegarLoop]: 2173 mSDtfsCounter, 3155 mSDsluCounter, 12419 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 484 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8247.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3162 SdHoareTripleChecker+Valid, 14592 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.23ms SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8681.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:53,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3162 Valid, 14592 Invalid, 1460 Unknown, 0 Unchecked, 36.23ms Time], IncrementalHoareTripleChecker [484 Valid, 975 Invalid, 1 Unknown, 0 Unchecked, 8681.61ms Time] [2021-11-13 02:29:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23999 states. [2021-11-13 02:29:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23999 to 13746. [2021-11-13 02:29:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13746 states, 10380 states have (on average 1.2903660886319845) internal successors, (13394), 10526 states have internal predecessors, (13394), 2255 states have call successors, (2255), 1084 states have call predecessors, (2255), 1110 states have return successors, (2422), 2242 states have call predecessors, (2422), 2254 states have call successors, (2422) [2021-11-13 02:29:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13746 states to 13746 states and 18071 transitions. [2021-11-13 02:29:55,288 INFO L78 Accepts]: Start accepts. Automaton has 13746 states and 18071 transitions. Word has length 145 [2021-11-13 02:29:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:55,289 INFO L470 AbstractCegarLoop]: Abstraction has 13746 states and 18071 transitions. [2021-11-13 02:29:55,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:29:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 13746 states and 18071 transitions. [2021-11-13 02:29:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:29:55,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:55,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:55,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 02:29:55,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:55,536 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash -425485594, now seen corresponding path program 1 times [2021-11-13 02:29:55,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:55,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848164357] [2021-11-13 02:29:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:55,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:55,538 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:29:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:29:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:29:57,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:29:58,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:58,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848164357] [2021-11-13 02:29:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848164357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:58,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946969548] [2021-11-13 02:29:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:58,910 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:29:58,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:29:58,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-13 02:29:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:59,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:29:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:30:01,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:30:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [946969548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:02,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878428569] [2021-11-13 02:30:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:02,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:30:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:30:02,330 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:30:02,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 02:30:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:30:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:30:04,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:30:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878428569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:05,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:30:05,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-13 02:30:05,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166603558] [2021-11-13 02:30:05,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:30:05,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:30:05,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:30:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:30:05,678 INFO L87 Difference]: Start difference. First operand 13746 states and 18071 transitions. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 6 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 02:30:07,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:23,663 INFO L93 Difference]: Finished difference Result 82399 states and 108333 transitions. [2021-11-13 02:30:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:30:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 6 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 145 [2021-11-13 02:30:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:23,965 INFO L225 Difference]: With dead ends: 82399 [2021-11-13 02:30:23,965 INFO L226 Difference]: Without dead ends: 82391 [2021-11-13 02:30:23,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:30:23,999 INFO L933 BasicCegarLoop]: 2313 mSDtfsCounter, 4542 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 670 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11788.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4542 SdHoareTripleChecker+Valid, 5962 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.13ms SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12563.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:24,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4542 Valid, 5962 Invalid, 2323 Unknown, 0 Unchecked, 26.13ms Time], IncrementalHoareTripleChecker [670 Valid, 1652 Invalid, 1 Unknown, 0 Unchecked, 12563.61ms Time] [2021-11-13 02:30:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82391 states. [2021-11-13 02:30:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82391 to 60968. [2021-11-13 02:30:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60968 states, 45998 states have (on average 1.2922735771120484) internal successors, (59442), 46710 states have internal predecessors, (59442), 10062 states have call successors, (10062), 4782 states have call predecessors, (10062), 4907 states have return successors, (10841), 9973 states have call predecessors, (10841), 10061 states have call successors, (10841) [2021-11-13 02:30:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60968 states to 60968 states and 80345 transitions. [2021-11-13 02:30:29,978 INFO L78 Accepts]: Start accepts. Automaton has 60968 states and 80345 transitions. Word has length 145 [2021-11-13 02:30:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:29,981 INFO L470 AbstractCegarLoop]: Abstraction has 60968 states and 80345 transitions. [2021-11-13 02:30:29,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 6 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 02:30:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 60968 states and 80345 transitions. [2021-11-13 02:30:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-13 02:30:30,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:30,059 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:30,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-13 02:30:30,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:30,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:30,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:30,675 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1581069731, now seen corresponding path program 1 times [2021-11-13 02:30:30,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:30,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694548] [2021-11-13 02:30:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:30,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:30,679 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:30,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:30:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:30:31,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 02:30:32,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 02:30:33,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:33,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694548] [2021-11-13 02:30:33,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:30:33,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:30:33,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:30:33,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430479831] [2021-11-13 02:30:33,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:33,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:30:33,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:30:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:30:33,867 INFO L87 Difference]: Start difference. First operand 60968 states and 80345 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 02:30:35,955 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 [] [2021-11-13 02:30:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:38,585 INFO L93 Difference]: Finished difference Result 82554 states and 108748 transitions. [2021-11-13 02:30:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:30:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 155 [2021-11-13 02:30:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:38,756 INFO L225 Difference]: With dead ends: 82554 [2021-11-13 02:30:38,756 INFO L226 Difference]: Without dead ends: 20139 [2021-11-13 02:30:38,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:30:38,842 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1293 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 231 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2559.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2734.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:38,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 1282 Invalid, 248 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [231 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2734.92ms Time] [2021-11-13 02:30:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20139 states. [2021-11-13 02:30:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20139 to 19774. [2021-11-13 02:30:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19774 states, 14909 states have (on average 1.288215172043732) internal successors, (19206), 15143 states have internal predecessors, (19206), 3272 states have call successors, (3272), 1551 states have call predecessors, (3272), 1592 states have return successors, (3531), 3243 states have call predecessors, (3531), 3271 states have call successors, (3531) [2021-11-13 02:30:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 26009 transitions. [2021-11-13 02:30:40,883 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 26009 transitions. Word has length 155 [2021-11-13 02:30:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:40,884 INFO L470 AbstractCegarLoop]: Abstraction has 19774 states and 26009 transitions. [2021-11-13 02:30:40,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 02:30:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 26009 transitions. [2021-11-13 02:30:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-13 02:30:40,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:40,916 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:40,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:41,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:41,132 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1503412519, now seen corresponding path program 1 times [2021-11-13 02:30:41,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:41,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111758730] [2021-11-13 02:30:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:41,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:41,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:41,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:41,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:30:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 02:30:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:30:46,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:30:56,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:56,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111758730] [2021-11-13 02:30:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111758730] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:30:56,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:30:56,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19] total 28 [2021-11-13 02:30:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574987094] [2021-11-13 02:30:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:56,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:30:56,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:30:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:30:56,344 INFO L87 Difference]: Start difference. First operand 19774 states and 26009 transitions. Second operand has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:30:58,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:00,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:02,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:04,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:06,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:08,464 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:16,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:20,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:22,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:24,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:26,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:28,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:10,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:12,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:14,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:16,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:19,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:21,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:26,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:28,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:44,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:45,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:47,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:48,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:49,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:51,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:53,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:54,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:56,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:57,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:59,149 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:00,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:04,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:06,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:08,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:11,002 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:12,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:14,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:18,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:21,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:23,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:24,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:27,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:28,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:30,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:35,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:37,191 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:39,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:41,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:49,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:51,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:52,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:58,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:00,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:02,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:03,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:06,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:11,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:21,394 INFO L93 Difference]: Finished difference Result 38314 states and 50460 transitions. [2021-11-13 02:34:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 02:34:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 157 [2021-11-13 02:34:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:21,471 INFO L225 Difference]: With dead ends: 38314 [2021-11-13 02:34:21,471 INFO L226 Difference]: Without dead ends: 19810 [2021-11-13 02:34:21,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 02:34:21,516 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 1161 mSDsluCounter, 3508 mSDsCounter, 0 mSdLazyCounter, 5571 mSolverCounterSat, 346 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187349.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 4767 SdHoareTripleChecker+Invalid, 5949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.14ms SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 5571 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196096.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:21,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 4767 Invalid, 5949 Unknown, 0 Unchecked, 72.14ms Time], IncrementalHoareTripleChecker [346 Valid, 5571 Invalid, 32 Unknown, 0 Unchecked, 196096.69ms Time] [2021-11-13 02:34:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19810 states. [2021-11-13 02:34:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19810 to 19768. [2021-11-13 02:34:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19768 states, 14889 states have (on average 1.2880650144401908) internal successors, (19178), 15145 states have internal predecessors, (19178), 3272 states have call successors, (3272), 1551 states have call predecessors, (3272), 1606 states have return successors, (3523), 3235 states have call predecessors, (3523), 3271 states have call successors, (3523) [2021-11-13 02:34:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19768 states to 19768 states and 25973 transitions. [2021-11-13 02:34:23,771 INFO L78 Accepts]: Start accepts. Automaton has 19768 states and 25973 transitions. Word has length 157 [2021-11-13 02:34:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:23,909 INFO L470 AbstractCegarLoop]: Abstraction has 19768 states and 25973 transitions. [2021-11-13 02:34:23,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:34:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 19768 states and 25973 transitions. [2021-11-13 02:34:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 02:34:23,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:23,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:23,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:24,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:24,159 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1491643287, now seen corresponding path program 1 times [2021-11-13 02:34:24,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:24,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148299621] [2021-11-13 02:34:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:24,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:24,162 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:24,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:34:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:34:25,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:34:26,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:26,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148299621] [2021-11-13 02:34:26,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148299621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:26,492 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:26,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:34:26,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552987015] [2021-11-13 02:34:26,495 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:26,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:26,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:26,498 INFO L87 Difference]: Start difference. First operand 19768 states and 25973 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:34:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:30,216 INFO L93 Difference]: Finished difference Result 50458 states and 68566 transitions. [2021-11-13 02:34:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 165 [2021-11-13 02:34:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:30,312 INFO L225 Difference]: With dead ends: 50458 [2021-11-13 02:34:30,313 INFO L226 Difference]: Without dead ends: 31960 [2021-11-13 02:34:30,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:30,354 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 476 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 521.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2869 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.54ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 568.86ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:30,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 2869 Invalid, 84 Unknown, 0 Unchecked, 6.54ms Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 568.86ms Time] [2021-11-13 02:34:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31960 states. [2021-11-13 02:34:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31960 to 20276. [2021-11-13 02:34:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20276 states, 15221 states have (on average 1.2844096971289665) internal successors, (19550), 15487 states have internal predecessors, (19550), 3448 states have call successors, (3448), 1551 states have call predecessors, (3448), 1606 states have return successors, (3731), 3401 states have call predecessors, (3731), 3447 states have call successors, (3731) [2021-11-13 02:34:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 26729 transitions. [2021-11-13 02:34:32,911 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 26729 transitions. Word has length 165 [2021-11-13 02:34:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:32,912 INFO L470 AbstractCegarLoop]: Abstraction has 20276 states and 26729 transitions. [2021-11-13 02:34:32,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:34:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 26729 transitions. [2021-11-13 02:34:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 02:34:32,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:32,932 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:32,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:33,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:33,148 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1313741947, now seen corresponding path program 1 times [2021-11-13 02:34:33,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:33,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460272111] [2021-11-13 02:34:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:33,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:33,151 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:33,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:34:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:34:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:34:35,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:34:37,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:37,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460272111] [2021-11-13 02:34:37,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460272111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:37,543 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:37,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-13 02:34:37,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127216439] [2021-11-13 02:34:37,544 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:37,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:34:37,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:34:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:37,545 INFO L87 Difference]: Start difference. First operand 20276 states and 26729 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 6 states have return successors, (32), 6 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-13 02:34:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:41,694 INFO L93 Difference]: Finished difference Result 51064 states and 69552 transitions. [2021-11-13 02:34:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 6 states have return successors, (32), 6 states have call predecessors, (32), 2 states have call successors, (32) Word has length 199 [2021-11-13 02:34:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:41,762 INFO L225 Difference]: With dead ends: 51064 [2021-11-13 02:34:41,762 INFO L226 Difference]: Without dead ends: 32058 [2021-11-13 02:34:41,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:41,789 INFO L933 BasicCegarLoop]: 1297 mSDtfsCounter, 449 mSDsluCounter, 8537 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 713.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 9834 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 775.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:41,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 9834 Invalid, 86 Unknown, 0 Unchecked, 15.59ms Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 775.62ms Time] [2021-11-13 02:34:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32058 states. [2021-11-13 02:34:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32058 to 20388. [2021-11-13 02:34:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20388 states, 15317 states have (on average 1.2826271463080237) internal successors, (19646), 15551 states have internal predecessors, (19646), 3448 states have call successors, (3448), 1551 states have call predecessors, (3448), 1622 states have return successors, (3763), 3449 states have call predecessors, (3763), 3447 states have call successors, (3763) [2021-11-13 02:34:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20388 states to 20388 states and 26857 transitions. [2021-11-13 02:34:44,341 INFO L78 Accepts]: Start accepts. Automaton has 20388 states and 26857 transitions. Word has length 199 [2021-11-13 02:34:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:44,341 INFO L470 AbstractCegarLoop]: Abstraction has 20388 states and 26857 transitions. [2021-11-13 02:34:44,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 6 states have return successors, (32), 6 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-13 02:34:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20388 states and 26857 transitions. [2021-11-13 02:34:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 02:34:44,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:44,366 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:44,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 02:34:44,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:44,568 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash 3020273, now seen corresponding path program 1 times [2021-11-13 02:34:44,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:44,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871403891] [2021-11-13 02:34:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:44,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:44,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:44,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:44,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:34:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 02:34:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:34:52,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:35:02,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:02,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871403891] [2021-11-13 02:35:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871403891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:02,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877709486] [2021-11-13 02:35:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:02,847 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:02,849 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:02,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bc108-6ce2-4b64-80e2-ca61564ffca4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-13 02:35:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 02:35:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 02:35:09,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 02:35:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1877709486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:19,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:35:19,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 10] imperfect sequences [16, 16] total 35 [2021-11-13 02:35:19,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498346297] [2021-11-13 02:35:19,121 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:19,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:35:19,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:19,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:35:19,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 02:35:19,123 INFO L87 Difference]: Start difference. First operand 20388 states and 26857 transitions. Second operand has 20 states, 18 states have (on average 8.666666666666666) internal successors, (156), 17 states have internal predecessors, (156), 7 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-13 02:35:21,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:23,203 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:25,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:27,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:29,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:31,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:33,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:35,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:37,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:24,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:26,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:33,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:38,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:55,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:57,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:58,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:00,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:02,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:05,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:07,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:08,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:10,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:12,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:13,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:15,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:17,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:18,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:20,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:21,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:29,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:31,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:34,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:36,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:38,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:39,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:40,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:43,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:45,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:47,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:49,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:51,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:53,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:55,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:57,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:59,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:01,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:03,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:05,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:07,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:16,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:18,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:19,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:22,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:23,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:24,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:27,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:29,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:31,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:33,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:39,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:40,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:42,017 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:44,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:45,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:46,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:47,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:49,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:50,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:53,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:55,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:56,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:06,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:08,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:10,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:12,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:14,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:16,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:18,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:20,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:29,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:54,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:57,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:55,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:07,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:08,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:12,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:13,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:14,936 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:17,184 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 []