./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:09,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:09,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:35:09,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:35:09,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:35:09,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:35:09,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:35:09,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:35:09,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:35:09,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:35:09,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:35:09,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:35:09,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:35:09,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:35:09,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:35:09,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:35:09,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:35:09,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:35:09,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:35:09,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:35:09,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:35:09,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:35:09,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:35:09,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:35:09,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:35:09,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:35:09,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:35:09,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:35:09,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:35:09,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:35:09,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:35:09,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:35:09,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:35:09,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:35:09,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:35:09,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:35:09,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:35:09,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:35:09,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:35:09,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:35:09,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:35:09,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:35:09,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:35:09,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:35:09,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:35:09,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:35:09,688 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:35:09,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:35:09,688 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:35:09,689 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:35:09,689 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:35:09,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:35:09,697 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:35:09,698 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:35:09,698 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:35:09,698 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:35:09,698 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:35:09,699 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:35:09,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:35:09,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:35:09,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:35:09,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:35:09,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:35:09,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:35:09,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:35:09,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:35:09,702 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:35:09,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:35:09,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:35:09,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:35:09,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:09,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:35:09,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:35:09,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:35:09,706 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:35:09,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:35:09,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:35:09,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:35:09,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:35:09,707 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 [2021-11-13 01:35:10,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:35:10,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:35:10,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:35:10,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:35:10,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:35:10,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-13 01:35:10,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/accbf6137/428486931f484a938eb0e441b6c121bf/FLAGec04cd3bb [2021-11-13 01:35:11,081 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:35:11,083 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-13 01:35:11,136 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/accbf6137/428486931f484a938eb0e441b6c121bf/FLAGec04cd3bb [2021-11-13 01:35:11,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/accbf6137/428486931f484a938eb0e441b6c121bf [2021-11-13 01:35:11,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:35:11,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:35:11,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:11,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:35:11,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:35:11,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:11" (1/1) ... [2021-11-13 01:35:11,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ee5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:11, skipping insertion in model container [2021-11-13 01:35:11,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:11" (1/1) ... [2021-11-13 01:35:11,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:35:11,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:12,589 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-13 01:35:12,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:12,895 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:35:12,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b3a99aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:12, skipping insertion in model container [2021-11-13 01:35:12,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:12,896 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:35:12,899 INFO L158 Benchmark]: Toolchain (without parser) took 1253.75ms. Allocated memory was 100.7MB in the beginning and 151.0MB in the end (delta: 50.3MB). Free memory was 74.9MB in the beginning and 111.0MB in the end (delta: -36.1MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2021-11-13 01:35:12,899 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 78.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:35:12,900 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1250.71ms. Allocated memory was 100.7MB in the beginning and 151.0MB in the end (delta: 50.3MB). Free memory was 74.5MB in the beginning and 111.0MB in the end (delta: -36.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2021-11-13 01:35:12,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 78.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1250.71ms. Allocated memory was 100.7MB in the beginning and 151.0MB in the end (delta: 50.3MB). Free memory was 74.5MB in the beginning and 111.0MB in the end (delta: -36.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5422]: 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:15,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:15,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:35:15,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:35:15,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:35:15,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:35:15,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:35:15,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:35:15,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:35:15,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:35:15,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:35:15,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:35:15,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:35:15,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:35:15,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:35:15,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:35:15,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:35:15,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:35:15,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:35:15,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:35:15,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:35:15,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:35:15,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:35:15,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:35:15,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:35:15,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:35:15,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:35:15,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:35:15,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:35:15,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:35:15,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:35:15,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:35:15,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:35:15,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:35:15,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:35:15,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:35:15,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:35:15,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:35:15,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:35:15,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:35:15,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:35:15,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:35:15,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:35:15,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:35:15,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:35:15,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:35:15,534 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:35:15,535 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:35:15,535 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:35:15,535 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:35:15,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:35:15,536 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:35:15,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:35:15,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:35:15,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:35:15,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:35:15,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:35:15,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:35:15,541 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:35:15,541 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:35:15,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:35:15,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:35:15,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:35:15,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:35:15,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:35:15,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:35:15,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:15,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:35:15,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:35:15,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:35:15,546 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:35:15,547 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:15,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:35:15,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:35:15,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:35:15,548 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 [2021-11-13 01:35:15,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:35:15,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:35:15,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:35:15,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:35:15,991 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:35:15,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-13 01:35:16,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/11dc88b70/0df2514f9897429b861888c9299545ac/FLAG0e12aef8f [2021-11-13 01:35:16,960 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:35:16,961 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-13 01:35:17,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/11dc88b70/0df2514f9897429b861888c9299545ac/FLAG0e12aef8f [2021-11-13 01:35:17,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/data/11dc88b70/0df2514f9897429b861888c9299545ac [2021-11-13 01:35:17,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:35:17,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:35:17,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:17,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:35:17,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:35:17,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:17" (1/1) ... [2021-11-13 01:35:17,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c99d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:17, skipping insertion in model container [2021-11-13 01:35:17,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:17" (1/1) ... [2021-11-13 01:35:17,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:35:17,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:18,476 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-13 01:35:18,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:18,748 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:35:18,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:18,962 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-13 01:35:19,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:19,082 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:35:19,274 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_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-13 01:35:19,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:19,365 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:35:19,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19 WrapperNode [2021-11-13 01:35:19,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:19,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:35:19,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:35:19,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:35:19,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:35:19,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:35:19,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:35:19,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:35:19,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:35:19,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:35:19,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:35:19,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:35:19,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (1/1) ... [2021-11-13 01:35:19,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:19,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:35:19,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:35:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:35:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 01:35:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:35:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 01:35:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 01:35:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 01:35:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 01:35:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 01:35:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 01:35:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 01:35:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 01:35:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 01:35:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 01:35:19,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 01:35:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_14 [2021-11-13 01:35:19,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_14 [2021-11-13 01:35:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~X~C_INT~X~$Pointer$~X~C_INT~TO~VOID [2021-11-13 01:35:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~X~C_INT~X~$Pointer$~X~C_INT~TO~VOID [2021-11-13 01:35:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-13 01:35:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-13 01:35:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 01:35:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 01:35:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 01:35:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 01:35:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 01:35:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 01:35:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:35:19,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:35:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:35:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-11-13 01:35:19,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-11-13 01:35:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:35:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:35:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 01:35:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 01:35:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 01:35:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:35:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-13 01:35:19,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-13 01:35:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 01:35:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 01:35:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 01:35:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:35:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:35:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:35:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:35:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 01:35:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-13 01:35:19,719 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-13 01:35:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_zalloc [2021-11-13 01:35:19,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_zalloc [2021-11-13 01:35:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-13 01:35:19,721 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-13 01:35:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure skb_mac_header [2021-11-13 01:35:19,722 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_mac_header [2021-11-13 01:35:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 01:35:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-13 01:35:19,724 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-13 01:35:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:35:19,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:35:20,344 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 01:35:24,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:35:24,238 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 01:35:24,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:35:24 BoogieIcfgContainer [2021-11-13 01:35:24,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:35:24,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:35:24,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:35:24,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:35:24,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:35:17" (1/3) ... [2021-11-13 01:35:24,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b712aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:35:24, skipping insertion in model container [2021-11-13 01:35:24,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:19" (2/3) ... [2021-11-13 01:35:24,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b712aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:35:24, skipping insertion in model container [2021-11-13 01:35:24,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:35:24" (3/3) ... [2021-11-13 01:35:24,251 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-13 01:35:24,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:35:24,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:35:24,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:35:24,327 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:35:24,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:35:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 170 states have (on average 1.3647058823529412) internal successors, (232), 175 states have internal predecessors, (232), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-13 01:35:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 01:35:24,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:24,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:24,367 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1585805392, now seen corresponding path program 1 times [2021-11-13 01:35:24,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:24,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247774789] [2021-11-13 01:35:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:24,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:24,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:24,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:24,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:35:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:35:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:24,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:25,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:25,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247774789] [2021-11-13 01:35:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247774789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:25,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:25,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:35:25,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078758260] [2021-11-13 01:35:25,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:35:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:35:25,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:35:25,252 INFO L87 Difference]: Start difference. First operand has 227 states, 170 states have (on average 1.3647058823529412) internal successors, (232), 175 states have internal predecessors, (232), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:25,357 INFO L93 Difference]: Finished difference Result 449 states and 630 transitions. [2021-11-13 01:35:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:35:25,363 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-11-13 01:35:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:25,382 INFO L225 Difference]: With dead ends: 449 [2021-11-13 01:35:25,383 INFO L226 Difference]: Without dead ends: 217 [2021-11-13 01:35:25,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:35:25,403 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:25,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 6.16ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:35:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-13 01:35:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-13 01:35:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 165 states have (on average 1.303030303030303) internal successors, (215), 165 states have internal predecessors, (215), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-13 01:35:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 288 transitions. [2021-11-13 01:35:25,516 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 288 transitions. Word has length 35 [2021-11-13 01:35:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:25,517 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 288 transitions. [2021-11-13 01:35:25,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 288 transitions. [2021-11-13 01:35:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 01:35:25,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:25,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:25,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:25,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:25,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1719818898, now seen corresponding path program 1 times [2021-11-13 01:35:25,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:25,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700598142] [2021-11-13 01:35:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:25,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:25,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:25,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:25,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:35:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:35:26,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:26,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:26,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:26,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700598142] [2021-11-13 01:35:26,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700598142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:26,375 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:26,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:35:26,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397858332] [2021-11-13 01:35:26,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:26,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:35:26,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:35:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:35:26,380 INFO L87 Difference]: Start difference. First operand 217 states and 288 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:26,452 INFO L93 Difference]: Finished difference Result 428 states and 569 transitions. [2021-11-13 01:35:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:35:26,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-11-13 01:35:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:26,456 INFO L225 Difference]: With dead ends: 428 [2021-11-13 01:35:26,456 INFO L226 Difference]: Without dead ends: 218 [2021-11-13 01:35:26,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 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 01:35:26,459 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.84ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:26,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 857 Invalid, 5 Unknown, 0 Unchecked, 9.76ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 24.84ms Time] [2021-11-13 01:35:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-13 01:35:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-13 01:35:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.3012048192771084) internal successors, (216), 166 states have internal predecessors, (216), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-13 01:35:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 289 transitions. [2021-11-13 01:35:26,484 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 289 transitions. Word has length 35 [2021-11-13 01:35:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:26,485 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 289 transitions. [2021-11-13 01:35:26,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 289 transitions. [2021-11-13 01:35:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 01:35:26,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:26,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:26,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:26,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:26,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1435931756, now seen corresponding path program 1 times [2021-11-13 01:35:26,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:26,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527469906] [2021-11-13 01:35:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:26,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:26,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:26,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:35:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:35:27,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:27,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:27,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:27,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527469906] [2021-11-13 01:35:27,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527469906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:27,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:27,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:35:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36178788] [2021-11-13 01:35:27,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:35:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:35:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:35:27,303 INFO L87 Difference]: Start difference. First operand 218 states and 289 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:28,249 INFO L93 Difference]: Finished difference Result 800 states and 1067 transitions. [2021-11-13 01:35:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:35:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-13 01:35:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:28,257 INFO L225 Difference]: With dead ends: 800 [2021-11-13 01:35:28,257 INFO L226 Difference]: Without dead ends: 591 [2021-11-13 01:35:28,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 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 01:35:28,266 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 508 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 783.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.87ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 869.51ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:28,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1042 Invalid, 100 Unknown, 0 Unchecked, 10.87ms Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 869.51ms Time] [2021-11-13 01:35:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-13 01:35:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-13 01:35:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 445 states have (on average 1.303370786516854) internal successors, (580), 445 states have internal predecessors, (580), 103 states have call successors, (103), 43 states have call predecessors, (103), 42 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-13 01:35:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 785 transitions. [2021-11-13 01:35:28,359 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 785 transitions. Word has length 36 [2021-11-13 01:35:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:28,361 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 785 transitions. [2021-11-13 01:35:28,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 785 transitions. [2021-11-13 01:35:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:35:28,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:28,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:28,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 01:35:28,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:28,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1862511787, now seen corresponding path program 1 times [2021-11-13 01:35:28,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:28,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626387126] [2021-11-13 01:35:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:28,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:28,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:28,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:35:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:35:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:29,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:29,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:29,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626387126] [2021-11-13 01:35:29,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626387126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:29,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:29,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:35:29,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515632091] [2021-11-13 01:35:29,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:29,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:35:29,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:35:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:35:29,156 INFO L87 Difference]: Start difference. First operand 591 states and 785 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:29,278 INFO L93 Difference]: Finished difference Result 1178 states and 1567 transitions. [2021-11-13 01:35:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:35:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-11-13 01:35:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:29,284 INFO L225 Difference]: With dead ends: 1178 [2021-11-13 01:35:29,285 INFO L226 Difference]: Without dead ends: 596 [2021-11-13 01:35:29,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:35:29,291 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 12 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.57ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:29,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 566 Invalid, 12 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 50.57ms Time] [2021-11-13 01:35:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-13 01:35:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-13 01:35:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 450 states have (on average 1.3022222222222222) internal successors, (586), 450 states have internal predecessors, (586), 103 states have call successors, (103), 43 states have call predecessors, (103), 42 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-13 01:35:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 791 transitions. [2021-11-13 01:35:29,351 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 791 transitions. Word has length 42 [2021-11-13 01:35:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:29,351 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 791 transitions. [2021-11-13 01:35:29,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 791 transitions. [2021-11-13 01:35:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 01:35:29,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:29,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:29,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:29,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1997190471, now seen corresponding path program 1 times [2021-11-13 01:35:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:29,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118544668] [2021-11-13 01:35:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:29,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:29,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:29,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:35:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:29,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:30,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:30,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118544668] [2021-11-13 01:35:30,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118544668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:30,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [726687857] [2021-11-13 01:35:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:30,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:30,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:30,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-13 01:35:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:35:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:35:30,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:35:30,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [726687857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:30,853 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:30,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-13 01:35:30,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741663521] [2021-11-13 01:35:30,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:30,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:35:30,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:30,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:35:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:35:30,861 INFO L87 Difference]: Start difference. First operand 596 states and 791 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:31,156 INFO L93 Difference]: Finished difference Result 1182 states and 1569 transitions. [2021-11-13 01:35:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:35:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-13 01:35:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:31,162 INFO L225 Difference]: With dead ends: 1182 [2021-11-13 01:35:31,162 INFO L226 Difference]: Without dead ends: 595 [2021-11-13 01:35:31,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:35:31,167 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 430 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.22ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:31,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 712 Invalid, 67 Unknown, 0 Unchecked, 6.22ms Time], IncrementalHoareTripleChecker [34 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 216.13ms Time] [2021-11-13 01:35:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-13 01:35:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-13 01:35:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 449 states have (on average 1.2962138084632517) internal successors, (582), 449 states have internal predecessors, (582), 103 states have call successors, (103), 43 states have call predecessors, (103), 42 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-13 01:35:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 787 transitions. [2021-11-13 01:35:31,228 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 787 transitions. Word has length 50 [2021-11-13 01:35:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 787 transitions. [2021-11-13 01:35:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:35:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 787 transitions. [2021-11-13 01:35:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 01:35:31,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:31,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 01:35:31,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:31,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-13 01:35:31,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:31,655 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -953496006, now seen corresponding path program 1 times [2021-11-13 01:35:31,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:31,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871991690] [2021-11-13 01:35:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:31,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:31,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:31,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:35:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:31,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:31,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:35:32,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:35:32,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:32,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871991690] [2021-11-13 01:35:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871991690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:32,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400671358] [2021-11-13 01:35:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:32,605 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:32,606 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-13 01:35:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:32,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:35:33,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 01:35:33,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400671358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:33,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:33,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-13 01:35:33,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680088199] [2021-11-13 01:35:33,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:33,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:33,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:33,861 INFO L87 Difference]: Start difference. First operand 595 states and 787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 01:35:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:34,197 INFO L93 Difference]: Finished difference Result 1764 states and 2364 transitions. [2021-11-13 01:35:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:35:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-13 01:35:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:34,208 INFO L225 Difference]: With dead ends: 1764 [2021-11-13 01:35:34,208 INFO L226 Difference]: Without dead ends: 1173 [2021-11-13 01:35:34,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:35:34,212 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 232 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.99ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.82ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:34,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1523 Invalid, 53 Unknown, 0 Unchecked, 13.99ms Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 157.82ms Time] [2021-11-13 01:35:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-11-13 01:35:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1161. [2021-11-13 01:35:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 872 states have (on average 1.2958715596330275) internal successors, (1130), 872 states have internal predecessors, (1130), 204 states have call successors, (204), 85 states have call predecessors, (204), 84 states have return successors, (221), 203 states have call predecessors, (221), 203 states have call successors, (221) [2021-11-13 01:35:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1555 transitions. [2021-11-13 01:35:34,302 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1555 transitions. Word has length 91 [2021-11-13 01:35:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:34,304 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1555 transitions. [2021-11-13 01:35:34,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 01:35:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1555 transitions. [2021-11-13 01:35:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:35:34,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:34,316 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:34,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:34,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:34,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:34,734 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -695294676, now seen corresponding path program 1 times [2021-11-13 01:35:34,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:34,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680395797] [2021-11-13 01:35:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:34,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:34,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:34,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:34,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:35:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:35,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:35,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:36,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:36,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680395797] [2021-11-13 01:35:36,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680395797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:36,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463777933] [2021-11-13 01:35:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:36,019 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:36,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 01:35:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:35:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:35:36,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:35:37,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463777933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:37,733 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:37,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-13 01:35:37,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935058296] [2021-11-13 01:35:37,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:37,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:35:37,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:37,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:35:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:35:37,735 INFO L87 Difference]: Start difference. First operand 1161 states and 1555 transitions. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:35:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:38,163 INFO L93 Difference]: Finished difference Result 2313 states and 3123 transitions. [2021-11-13 01:35:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:35:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 142 [2021-11-13 01:35:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:38,175 INFO L225 Difference]: With dead ends: 2313 [2021-11-13 01:35:38,175 INFO L226 Difference]: Without dead ends: 1161 [2021-11-13 01:35:38,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:35:38,181 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 16 mSDsluCounter, 2177 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.45ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:38,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2452 Invalid, 72 Unknown, 0 Unchecked, 6.67ms Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 214.45ms Time] [2021-11-13 01:35:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-13 01:35:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1161. [2021-11-13 01:35:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 872 states have (on average 1.2821100917431192) internal successors, (1118), 872 states have internal predecessors, (1118), 204 states have call successors, (204), 85 states have call predecessors, (204), 84 states have return successors, (221), 203 states have call predecessors, (221), 203 states have call successors, (221) [2021-11-13 01:35:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1543 transitions. [2021-11-13 01:35:38,305 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1543 transitions. Word has length 142 [2021-11-13 01:35:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:38,306 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1543 transitions. [2021-11-13 01:35:38,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:35:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1543 transitions. [2021-11-13 01:35:38,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:35:38,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:38,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:38,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:38,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:38,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:38,717 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 40571061, now seen corresponding path program 1 times [2021-11-13 01:35:38,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:38,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992392361] [2021-11-13 01:35:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:38,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:38,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:38,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:35:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:39,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:40,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:40,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992392361] [2021-11-13 01:35:40,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992392361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:40,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1747644606] [2021-11-13 01:35:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:40,087 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:40,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:40,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-13 01:35:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:41,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:41,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1747644606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:41,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306863678] [2021-11-13 01:35:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:41,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:41,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:41,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:35:41,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 01:35:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:35:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:35:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:35:45,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306863678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:45,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:35:45,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [5, 5, 5, 5] total 30 [2021-11-13 01:35:45,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279789210] [2021-11-13 01:35:45,700 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:45,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 01:35:45,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 01:35:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-11-13 01:35:45,701 INFO L87 Difference]: Start difference. First operand 1161 states and 1543 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 18 states have internal predecessors, (105), 8 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (18), 13 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-13 01:35:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:46,912 INFO L93 Difference]: Finished difference Result 2785 states and 3790 transitions. [2021-11-13 01:35:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 01:35:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 18 states have internal predecessors, (105), 8 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (18), 13 states have call predecessors, (18), 7 states have call successors, (18) Word has length 148 [2021-11-13 01:35:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:46,926 INFO L225 Difference]: With dead ends: 2785 [2021-11-13 01:35:46,926 INFO L226 Difference]: Without dead ends: 1633 [2021-11-13 01:35:46,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:35:46,931 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 144 mSDsluCounter, 6539 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 676.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 6944 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.29ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 776.21ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:46,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 6944 Invalid, 234 Unknown, 0 Unchecked, 16.29ms Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 776.21ms Time] [2021-11-13 01:35:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-11-13 01:35:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1149. [2021-11-13 01:35:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 860 states have (on average 1.2720930232558139) internal successors, (1094), 860 states have internal predecessors, (1094), 204 states have call successors, (204), 85 states have call predecessors, (204), 84 states have return successors, (221), 203 states have call predecessors, (221), 203 states have call successors, (221) [2021-11-13 01:35:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1519 transitions. [2021-11-13 01:35:47,017 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1519 transitions. Word has length 148 [2021-11-13 01:35:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:47,018 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1519 transitions. [2021-11-13 01:35:47,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 18 states have internal predecessors, (105), 8 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (18), 13 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-13 01:35:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1519 transitions. [2021-11-13 01:35:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 01:35:47,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:47,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:47,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:47,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-13 01:35:47,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:47,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:47,631 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1374707837, now seen corresponding path program 1 times [2021-11-13 01:35:47,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:47,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103801921] [2021-11-13 01:35:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:47,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:47,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:47,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:35:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:47,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:48,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:48,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:48,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103801921] [2021-11-13 01:35:48,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103801921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:48,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126288318] [2021-11-13 01:35:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:48,639 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:48,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:48,640 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:48,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:35:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:49,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:49,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126288318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:49,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121039300] [2021-11-13 01:35:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:49,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:49,827 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:35:49,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 01:35:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:35:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:35:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:35:53,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121039300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:53,368 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:35:53,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [5, 5, 5, 5] total 30 [2021-11-13 01:35:53,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26220611] [2021-11-13 01:35:53,369 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:53,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 01:35:53,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:53,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 01:35:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-11-13 01:35:53,371 INFO L87 Difference]: Start difference. First operand 1149 states and 1519 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 18 states have internal predecessors, (104), 8 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (18), 13 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-13 01:35:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:54,754 INFO L93 Difference]: Finished difference Result 2827 states and 3844 transitions. [2021-11-13 01:35:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 01:35:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 18 states have internal predecessors, (104), 8 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (18), 13 states have call predecessors, (18), 7 states have call successors, (18) Word has length 147 [2021-11-13 01:35:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:54,768 INFO L225 Difference]: With dead ends: 2827 [2021-11-13 01:35:54,768 INFO L226 Difference]: Without dead ends: 1687 [2021-11-13 01:35:54,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:35:54,775 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 266 mSDsluCounter, 7223 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 794.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 7635 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.94ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 904.42ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:54,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 7635 Invalid, 256 Unknown, 0 Unchecked, 14.94ms Time], IncrementalHoareTripleChecker [27 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 904.42ms Time] [2021-11-13 01:35:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-11-13 01:35:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1143. [2021-11-13 01:35:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 854 states have (on average 1.259953161592506) internal successors, (1076), 854 states have internal predecessors, (1076), 204 states have call successors, (204), 85 states have call predecessors, (204), 84 states have return successors, (221), 203 states have call predecessors, (221), 203 states have call successors, (221) [2021-11-13 01:35:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1501 transitions. [2021-11-13 01:35:54,888 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1501 transitions. Word has length 147 [2021-11-13 01:35:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:54,889 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 1501 transitions. [2021-11-13 01:35:54,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 18 states have internal predecessors, (104), 8 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (18), 13 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-13 01:35:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1501 transitions. [2021-11-13 01:35:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 01:35:54,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:54,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:35:54,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:55,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:55,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:55,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash -415973130, now seen corresponding path program 1 times [2021-11-13 01:35:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:55,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047093522] [2021-11-13 01:35:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:55,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:55,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:55,517 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:55,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:35:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:56,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:56,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:56,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047093522] [2021-11-13 01:35:56,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047093522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:56,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102691087] [2021-11-13 01:35:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:56,817 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:56,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:56,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:56,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 01:35:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:35:58,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:35:58,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102691087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:58,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201874049] [2021-11-13 01:35:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:58,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:58,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:35:58,451 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:35:58,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 01:35:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:35:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:35:59,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:35:59,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201874049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:59,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:35:59,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 13 [2021-11-13 01:35:59,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076471468] [2021-11-13 01:35:59,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:59,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:59,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:59,702 INFO L87 Difference]: Start difference. First operand 1143 states and 1501 transitions. Second operand has 7 states, 5 states have (on average 23.6) internal successors, (118), 7 states have internal predecessors, (118), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 01:36:01,744 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 01:36:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:02,245 INFO L93 Difference]: Finished difference Result 2905 states and 4051 transitions. [2021-11-13 01:36:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 23.6) internal successors, (118), 7 states have internal predecessors, (118), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 4 states have call successors, (19) Word has length 184 [2021-11-13 01:36:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:02,259 INFO L225 Difference]: With dead ends: 2905 [2021-11-13 01:36:02,259 INFO L226 Difference]: Without dead ends: 1771 [2021-11-13 01:36:02,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1087 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:36:02,264 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 260 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2302.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.45ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2383.58ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:02,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1548 Invalid, 90 Unknown, 0 Unchecked, 4.45ms Time], IncrementalHoareTripleChecker [33 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 2383.58ms Time] [2021-11-13 01:36:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-11-13 01:36:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1167. [2021-11-13 01:36:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 872 states have (on average 1.261467889908257) internal successors, (1100), 878 states have internal predecessors, (1100), 204 states have call successors, (204), 85 states have call predecessors, (204), 90 states have return successors, (245), 203 states have call predecessors, (245), 203 states have call successors, (245) [2021-11-13 01:36:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1549 transitions. [2021-11-13 01:36:02,368 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1549 transitions. Word has length 184 [2021-11-13 01:36:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:02,369 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1549 transitions. [2021-11-13 01:36:02,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 23.6) internal successors, (118), 7 states have internal predecessors, (118), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 01:36:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1549 transitions. [2021-11-13 01:36:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 01:36:02,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:02,376 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:36:02,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:02,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-13 01:36:02,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:02,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:02,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1836782836, now seen corresponding path program 1 times [2021-11-13 01:36:02,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:02,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209705968] [2021-11-13 01:36:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:02,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:02,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:02,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:36:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:03,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:03,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:36:03,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:36:04,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:04,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209705968] [2021-11-13 01:36:04,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209705968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:04,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829086879] [2021-11-13 01:36:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:04,427 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:04,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:04,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-13 01:36:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:36:05,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:36:05,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829086879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:05,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:05,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-13 01:36:05,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025451409] [2021-11-13 01:36:05,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:05,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:05,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:05,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:36:05,736 INFO L87 Difference]: Start difference. First operand 1167 states and 1549 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 01:36:07,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:09,826 WARN L515 Checker$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 01:36:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:10,030 INFO L93 Difference]: Finished difference Result 2331 states and 3129 transitions. [2021-11-13 01:36:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:10,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 185 [2021-11-13 01:36:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:10,042 INFO L225 Difference]: With dead ends: 2331 [2021-11-13 01:36:10,042 INFO L226 Difference]: Without dead ends: 1173 [2021-11-13 01:36:10,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 726 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:36:10,047 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 4 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4175.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4227.96ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:10,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 811 Invalid, 37 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 2 Unknown, 0 Unchecked, 4227.96ms Time] [2021-11-13 01:36:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-11-13 01:36:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1173. [2021-11-13 01:36:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 878 states have (on average 1.2596810933940774) internal successors, (1106), 884 states have internal predecessors, (1106), 204 states have call successors, (204), 85 states have call predecessors, (204), 90 states have return successors, (245), 203 states have call predecessors, (245), 203 states have call successors, (245) [2021-11-13 01:36:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1555 transitions. [2021-11-13 01:36:10,170 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1555 transitions. Word has length 185 [2021-11-13 01:36:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:10,171 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1555 transitions. [2021-11-13 01:36:10,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 01:36:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1555 transitions. [2021-11-13 01:36:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 01:36:10,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:10,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:36:10,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:10,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:10,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:10,587 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash 595182200, now seen corresponding path program 1 times [2021-11-13 01:36:10,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:10,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963415583] [2021-11-13 01:36:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:10,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:10,589 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:10,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:36:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:36:11,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-13 01:36:11,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:11,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963415583] [2021-11-13 01:36:11,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963415583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:11,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [910502192] [2021-11-13 01:36:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:11,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:11,996 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:11,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-13 01:36:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:12,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:36:13,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-13 01:36:13,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [910502192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:13,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460368554] [2021-11-13 01:36:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:13,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:13,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:13,581 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:13,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 01:36:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:36:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:36:14,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 01:36:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460368554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:16,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-13 01:36:16,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5, 5, 5, 8] total 21 [2021-11-13 01:36:16,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543052177] [2021-11-13 01:36:16,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:16,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:36:16,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:36:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:36:16,168 INFO L87 Difference]: Start difference. First operand 1173 states and 1555 transitions. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 7 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-13 01:36:20,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:23,440 WARN L515 Checker$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 01:36:25,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:28,782 WARN L515 Checker$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 01:36:30,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:33,589 WARN L515 Checker$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 01:36:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:34,500 INFO L93 Difference]: Finished difference Result 3811 states and 5091 transitions. [2021-11-13 01:36:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:36:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 7 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 186 [2021-11-13 01:36:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:34,524 INFO L225 Difference]: With dead ends: 3811 [2021-11-13 01:36:34,524 INFO L226 Difference]: Without dead ends: 3177 [2021-11-13 01:36:34,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 1095 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:36:34,529 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 1482 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 524 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16731.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.35ms SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17322.55ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:34,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1522 Invalid, 1470 Unknown, 0 Unchecked, 20.35ms Time], IncrementalHoareTripleChecker [524 Valid, 940 Invalid, 6 Unknown, 0 Unchecked, 17322.55ms Time] [2021-11-13 01:36:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2021-11-13 01:36:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 2940. [2021-11-13 01:36:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2195 states have (on average 1.2596810933940774) internal successors, (2765), 2216 states have internal predecessors, (2765), 507 states have call successors, (507), 211 states have call predecessors, (507), 237 states have return successors, (647), 512 states have call predecessors, (647), 506 states have call successors, (647) [2021-11-13 01:36:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 3919 transitions. [2021-11-13 01:36:34,781 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 3919 transitions. Word has length 186 [2021-11-13 01:36:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:34,782 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 3919 transitions. [2021-11-13 01:36:34,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 7 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-13 01:36:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 3919 transitions. [2021-11-13 01:36:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 01:36:34,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:34,791 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:36:34,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:35,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:35,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:35,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:35,414 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1248861911, now seen corresponding path program 1 times [2021-11-13 01:36:35,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:35,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595886992] [2021-11-13 01:36:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:35,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:35,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:35,416 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:35,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 01:36:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:36:36,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-13 01:36:37,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:37,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595886992] [2021-11-13 01:36:37,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595886992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:37,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [181955601] [2021-11-13 01:36:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:37,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:37,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:37,012 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:37,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-13 01:36:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:37,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 01:36:37,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 01:36:38,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [181955601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:38,089 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:38,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-13 01:36:38,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164381442] [2021-11-13 01:36:38,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:38,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:36:38,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:36:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:36:38,092 INFO L87 Difference]: Start difference. First operand 2940 states and 3919 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 01:36:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:38,460 INFO L93 Difference]: Finished difference Result 6153 states and 8292 transitions. [2021-11-13 01:36:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:36:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 188 [2021-11-13 01:36:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:38,483 INFO L225 Difference]: With dead ends: 6153 [2021-11-13 01:36:38,484 INFO L226 Difference]: Without dead ends: 3222 [2021-11-13 01:36:38,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 738 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:36:38,494 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 34 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.85ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:38,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1088 Invalid, 53 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 133.85ms Time] [2021-11-13 01:36:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2021-11-13 01:36:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3054. [2021-11-13 01:36:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 2309 states have (on average 1.270246860112603) internal successors, (2933), 2330 states have internal predecessors, (2933), 507 states have call successors, (507), 211 states have call predecessors, (507), 237 states have return successors, (647), 512 states have call predecessors, (647), 506 states have call successors, (647) [2021-11-13 01:36:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 4087 transitions. [2021-11-13 01:36:38,773 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 4087 transitions. Word has length 188 [2021-11-13 01:36:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:38,774 INFO L470 AbstractCegarLoop]: Abstraction has 3054 states and 4087 transitions. [2021-11-13 01:36:38,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 01:36:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 4087 transitions. [2021-11-13 01:36:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 01:36:38,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:38,783 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:36:38,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:39,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:39,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:39,187 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2051329640, now seen corresponding path program 1 times [2021-11-13 01:36:39,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:39,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730699793] [2021-11-13 01:36:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:39,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:39,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:39,189 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:39,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 01:36:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:36:40,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-13 01:36:40,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:40,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730699793] [2021-11-13 01:36:40,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730699793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:40,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634146588] [2021-11-13 01:36:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:40,755 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:40,756 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:40,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-13 01:36:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:36:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 01:36:41,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 01:36:41,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1634146588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:41,886 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:41,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 01:36:41,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773373145] [2021-11-13 01:36:41,887 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:36:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:36:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:36:41,889 INFO L87 Difference]: Start difference. First operand 3054 states and 4087 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 01:36:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:42,062 INFO L93 Difference]: Finished difference Result 5518 states and 7434 transitions. [2021-11-13 01:36:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:36:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 190 [2021-11-13 01:36:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:42,083 INFO L225 Difference]: With dead ends: 5518 [2021-11-13 01:36:42,083 INFO L226 Difference]: Without dead ends: 3069 [2021-11-13 01:36:42,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:36:42,092 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 5 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.84ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:42,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 544 Invalid, 4 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 9.84ms Time] [2021-11-13 01:36:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-11-13 01:36:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 3069. [2021-11-13 01:36:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2324 states have (on average 1.2685025817555937) internal successors, (2948), 2345 states have internal predecessors, (2948), 507 states have call successors, (507), 211 states have call predecessors, (507), 237 states have return successors, (647), 512 states have call predecessors, (647), 506 states have call successors, (647) [2021-11-13 01:36:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 4102 transitions. [2021-11-13 01:36:42,334 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 4102 transitions. Word has length 190 [2021-11-13 01:36:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:42,335 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 4102 transitions. [2021-11-13 01:36:42,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 01:36:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 4102 transitions. [2021-11-13 01:36:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 01:36:42,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:42,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 01:36:42,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:42,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:42,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:42,766 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1240537072, now seen corresponding path program 1 times [2021-11-13 01:36:42,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:42,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820845216] [2021-11-13 01:36:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:42,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:42,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:42,768 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:42,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 01:36:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 01:36:43,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 01:36:44,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:44,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820845216] [2021-11-13 01:36:44,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820845216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:44,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1192773266] [2021-11-13 01:36:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:44,176 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:44,176 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:44,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-13 01:36:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 01:36:45,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 01:36:45,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1192773266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:45,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044074756] [2021-11-13 01:36:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:45,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:45,773 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:45,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-13 01:36:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:46,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:36:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-13 01:36:46,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-13 01:36:47,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044074756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:47,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:36:47,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 15 [2021-11-13 01:36:47,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548067234] [2021-11-13 01:36:47,225 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:47,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 01:36:47,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:47,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 01:36:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:36:47,227 INFO L87 Difference]: Start difference. First operand 3069 states and 4102 transitions. Second operand has 15 states, 13 states have (on average 16.153846153846153) internal successors, (210), 15 states have internal predecessors, (210), 4 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 2 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-13 01:36:49,716 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 01:36:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:51,391 INFO L93 Difference]: Finished difference Result 7835 states and 10987 transitions. [2021-11-13 01:36:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 01:36:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 16.153846153846153) internal successors, (210), 15 states have internal predecessors, (210), 4 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 2 states have call predecessors, (40), 4 states have call successors, (40) Word has length 190 [2021-11-13 01:36:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:51,443 INFO L225 Difference]: With dead ends: 7835 [2021-11-13 01:36:51,443 INFO L226 Difference]: Without dead ends: 4775 [2021-11-13 01:36:51,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1129 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:36:51,455 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 329 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3293.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.22ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3516.92ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:51,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 4066 Invalid, 455 Unknown, 0 Unchecked, 10.22ms Time], IncrementalHoareTripleChecker [56 Valid, 398 Invalid, 1 Unknown, 0 Unchecked, 3516.92ms Time] [2021-11-13 01:36:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4775 states. [2021-11-13 01:36:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4775 to 3164. [2021-11-13 01:36:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 2419 states have (on average 1.2724266225713106) internal successors, (3078), 2440 states have internal predecessors, (3078), 507 states have call successors, (507), 211 states have call predecessors, (507), 237 states have return successors, (647), 512 states have call predecessors, (647), 506 states have call successors, (647) [2021-11-13 01:36:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4232 transitions. [2021-11-13 01:36:51,761 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4232 transitions. Word has length 190 [2021-11-13 01:36:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:51,762 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 4232 transitions. [2021-11-13 01:36:51,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 16.153846153846153) internal successors, (210), 15 states have internal predecessors, (210), 4 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 2 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-13 01:36:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4232 transitions. [2021-11-13 01:36:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-13 01:36:51,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:51,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:36:51,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:52,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:52,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:52,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:52,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1385462375, now seen corresponding path program 1 times [2021-11-13 01:36:52,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:52,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080544611] [2021-11-13 01:36:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:52,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:52,407 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:52,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 01:36:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:36:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 01:36:53,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-13 01:36:54,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080544611] [2021-11-13 01:36:54,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080544611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1580401610] [2021-11-13 01:36:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:54,232 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:54,233 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:54,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-13 01:36:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:54,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:36:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-13 01:36:55,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-13 01:36:55,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1580401610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:55,471 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:55,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 18 [2021-11-13 01:36:55,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703000845] [2021-11-13 01:36:55,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:55,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:36:55,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:36:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:36:55,474 INFO L87 Difference]: Start difference. First operand 3164 states and 4232 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:36:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:55,811 INFO L93 Difference]: Finished difference Result 7555 states and 10285 transitions. [2021-11-13 01:36:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:36:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 220 [2021-11-13 01:36:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:55,869 INFO L225 Difference]: With dead ends: 7555 [2021-11-13 01:36:55,869 INFO L226 Difference]: Without dead ends: 4400 [2021-11-13 01:36:55,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:36:55,879 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 116 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.46ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:55,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 946 Invalid, 5 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 23.46ms Time] [2021-11-13 01:36:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-11-13 01:36:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 3134. [2021-11-13 01:36:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 2404 states have (on average 1.2678868552412645) internal successors, (3048), 2425 states have internal predecessors, (3048), 492 states have call successors, (492), 211 states have call predecessors, (492), 237 states have return successors, (617), 497 states have call predecessors, (617), 491 states have call successors, (617) [2021-11-13 01:36:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 4157 transitions. [2021-11-13 01:36:56,154 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 4157 transitions. Word has length 220 [2021-11-13 01:36:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:56,155 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 4157 transitions. [2021-11-13 01:36:56,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:36:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 4157 transitions. [2021-11-13 01:36:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-13 01:36:56,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:56,167 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:36:56,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:56,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:56,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:56,571 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash 458839758, now seen corresponding path program 1 times [2021-11-13 01:36:56,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:56,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62002796] [2021-11-13 01:36:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:56,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:56,573 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:56,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-13 01:36:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:36:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 01:36:57,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-13 01:36:58,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:58,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62002796] [2021-11-13 01:36:58,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62002796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:58,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335666569] [2021-11-13 01:36:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:58,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:58,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:58,354 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:58,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-13 01:36:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-13 01:36:59,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-13 01:36:59,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1335666569] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:59,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:59,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9, 5] total 21 [2021-11-13 01:36:59,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811299432] [2021-11-13 01:36:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:59,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:59,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:36:59,795 INFO L87 Difference]: Start difference. First operand 3134 states and 4157 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 01:37:01,857 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 01:37:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:02,249 INFO L93 Difference]: Finished difference Result 7555 states and 10255 transitions. [2021-11-13 01:37:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:02,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) Word has length 221 [2021-11-13 01:37:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:02,268 INFO L225 Difference]: With dead ends: 7555 [2021-11-13 01:37:02,269 INFO L226 Difference]: Without dead ends: 4430 [2021-11-13 01:37:02,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:37:02,281 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 118 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2098.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2139.95ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:02,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1469 Invalid, 25 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2139.95ms Time] [2021-11-13 01:37:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-11-13 01:37:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3164. [2021-11-13 01:37:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 2419 states have (on average 1.2662257131045886) internal successors, (3063), 2455 states have internal predecessors, (3063), 492 states have call successors, (492), 211 states have call predecessors, (492), 252 states have return successors, (647), 497 states have call predecessors, (647), 491 states have call successors, (647) [2021-11-13 01:37:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4202 transitions. [2021-11-13 01:37:02,557 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4202 transitions. Word has length 221 [2021-11-13 01:37:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:02,558 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 4202 transitions. [2021-11-13 01:37:02,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 01:37:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4202 transitions. [2021-11-13 01:37:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 01:37:02,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:02,568 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:02,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:02,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:37:02,983 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:02,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1414252352, now seen corresponding path program 2 times [2021-11-13 01:37:02,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:02,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915283211] [2021-11-13 01:37:02,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:37:02,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:02,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:02,985 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:02,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 01:37:04,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:37:04,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:37:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:37:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:37:05,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:37:06,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:06,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915283211] [2021-11-13 01:37:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915283211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:06,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [103578885] [2021-11-13 01:37:06,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:37:06,429 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:37:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:37:06,430 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:37:06,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-13 01:37:12,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:37:12,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:37:12,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:37:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:37:12,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:37:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [103578885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:13,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800540897] [2021-11-13 01:37:13,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:37:13,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:37:13,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:37:13,387 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:37:13,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-13 01:37:49,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:37:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:37:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-13 01:37:50,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-13 01:37:51,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800540897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:51,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:37:51,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 6, 6] total 23 [2021-11-13 01:37:51,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794691282] [2021-11-13 01:37:51,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:37:51,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 01:37:51,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:51,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 01:37:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:37:51,033 INFO L87 Difference]: Start difference. First operand 3164 states and 4202 transitions. Second operand has 23 states, 21 states have (on average 11.619047619047619) internal successors, (244), 23 states have internal predecessors, (244), 4 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 2 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-13 01:37:54,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:56,282 WARN L515 Checker$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 01:37:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:58,691 INFO L93 Difference]: Finished difference Result 8070 states and 11272 transitions. [2021-11-13 01:37:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 01:37:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 11.619047619047619) internal successors, (244), 23 states have internal predecessors, (244), 4 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 2 states have call predecessors, (40), 4 states have call successors, (40) Word has length 207 [2021-11-13 01:37:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:58,710 INFO L225 Difference]: With dead ends: 8070 [2021-11-13 01:37:58,710 INFO L226 Difference]: Without dead ends: 4915 [2021-11-13 01:37:58,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 01:37:58,721 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 369 mSDsluCounter, 5748 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6575.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 6175 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.37ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6971.68ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:58,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 6175 Invalid, 1047 Unknown, 0 Unchecked, 14.37ms Time], IncrementalHoareTripleChecker [58 Valid, 987 Invalid, 2 Unknown, 0 Unchecked, 6971.68ms Time] [2021-11-13 01:37:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-11-13 01:37:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 3249. [2021-11-13 01:37:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 2504 states have (on average 1.2731629392971247) internal successors, (3188), 2540 states have internal predecessors, (3188), 492 states have call successors, (492), 211 states have call predecessors, (492), 252 states have return successors, (647), 497 states have call predecessors, (647), 491 states have call successors, (647) [2021-11-13 01:37:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 4327 transitions. [2021-11-13 01:37:59,025 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 4327 transitions. Word has length 207 [2021-11-13 01:37:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:59,025 INFO L470 AbstractCegarLoop]: Abstraction has 3249 states and 4327 transitions. [2021-11-13 01:37:59,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 11.619047619047619) internal successors, (244), 23 states have internal predecessors, (244), 4 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 2 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-13 01:37:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 4327 transitions. [2021-11-13 01:37:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-13 01:37:59,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:59,034 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-13 01:37:59,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:59,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:59,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:59,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:59,651 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash 182517961, now seen corresponding path program 1 times [2021-11-13 01:37:59,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:59,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999650702] [2021-11-13 01:37:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:59,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:59,653 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:59,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-13 01:38:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:38:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-13 01:38:00,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-13 01:38:01,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:01,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999650702] [2021-11-13 01:38:01,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999650702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:01,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008884233] [2021-11-13 01:38:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:01,391 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:38:01,392 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:38:01,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-13 01:38:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:01,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:38:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-13 01:38:02,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-13 01:38:02,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1008884233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:02,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:38:02,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-13 01:38:02,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46449316] [2021-11-13 01:38:02,734 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:02,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:38:02,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:38:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:38:02,736 INFO L87 Difference]: Start difference. First operand 3249 states and 4327 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 01:38:04,772 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 01:38:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:05,092 INFO L93 Difference]: Finished difference Result 7765 states and 10510 transitions. [2021-11-13 01:38:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:38:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 230 [2021-11-13 01:38:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:05,109 INFO L225 Difference]: With dead ends: 7765 [2021-11-13 01:38:05,109 INFO L226 Difference]: Without dead ends: 4480 [2021-11-13 01:38:05,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:38:05,121 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 116 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2072.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2095.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:05,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1335 Invalid, 21 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 2095.73ms Time] [2021-11-13 01:38:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-11-13 01:38:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 3174. [2021-11-13 01:38:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 2459 states have (on average 1.2659617730784871) internal successors, (3113), 2480 states have internal predecessors, (3113), 477 states have call successors, (477), 211 states have call predecessors, (477), 237 states have return successors, (587), 482 states have call predecessors, (587), 476 states have call successors, (587) [2021-11-13 01:38:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 4177 transitions. [2021-11-13 01:38:05,416 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 4177 transitions. Word has length 230 [2021-11-13 01:38:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:05,417 INFO L470 AbstractCegarLoop]: Abstraction has 3174 states and 4177 transitions. [2021-11-13 01:38:05,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 01:38:05,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 4177 transitions. [2021-11-13 01:38:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-13 01:38:05,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:05,427 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:05,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:05,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:05,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:05,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash -19615580, now seen corresponding path program 3 times [2021-11-13 01:38:05,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:05,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437975864] [2021-11-13 01:38:05,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:38:05,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:05,853 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:05,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-13 01:38:07,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 01:38:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:38:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:38:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:38:08,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:38:09,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:09,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437975864] [2021-11-13 01:38:09,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437975864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:09,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1705397602] [2021-11-13 01:38:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:38:09,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:38:09,167 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:38:09,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-13 01:38:15,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 01:38:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:38:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:38:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:38:15,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:38:16,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1705397602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:16,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480482377] [2021-11-13 01:38:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:38:16,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:38:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:38:16,294 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:38:16,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-13 01:38:59,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 01:38:59,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:39:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:00,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:01,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480482377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:01,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:39:01,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-11-13 01:39:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469177705] [2021-11-13 01:39:01,837 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 01:39:01,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 01:39:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:39:01,839 INFO L87 Difference]: Start difference. First operand 3174 states and 4177 transitions. Second operand has 17 states, 14 states have (on average 9.928571428571429) internal successors, (139), 17 states have internal predecessors, (139), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 01:39:03,924 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 01:39:05,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:08,036 WARN L515 Checker$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 01:39:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:09,180 INFO L93 Difference]: Finished difference Result 8050 states and 11062 transitions. [2021-11-13 01:39:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:39:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.928571428571429) internal successors, (139), 17 states have internal predecessors, (139), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 5 states have call successors, (21) Word has length 216 [2021-11-13 01:39:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:09,200 INFO L225 Difference]: With dead ends: 8050 [2021-11-13 01:39:09,201 INFO L226 Difference]: Without dead ends: 4885 [2021-11-13 01:39:09,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1275 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:39:09,212 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 279 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 39 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6857.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.34ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6987.89ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:09,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 3424 Invalid, 199 Unknown, 0 Unchecked, 6.34ms Time], IncrementalHoareTripleChecker [39 Valid, 157 Invalid, 3 Unknown, 0 Unchecked, 6987.89ms Time] [2021-11-13 01:39:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-11-13 01:39:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3189. [2021-11-13 01:39:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 2474 states have (on average 1.2704122877930477) internal successors, (3143), 2495 states have internal predecessors, (3143), 477 states have call successors, (477), 211 states have call predecessors, (477), 237 states have return successors, (587), 482 states have call predecessors, (587), 476 states have call successors, (587) [2021-11-13 01:39:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4207 transitions. [2021-11-13 01:39:09,554 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4207 transitions. Word has length 216 [2021-11-13 01:39:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:09,554 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4207 transitions. [2021-11-13 01:39:09,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.928571428571429) internal successors, (139), 17 states have internal predecessors, (139), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 01:39:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4207 transitions. [2021-11-13 01:39:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-13 01:39:09,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:09,564 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:09,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:09,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-13 01:39:09,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-11-13 01:39:10,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:10,179 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash 710211790, now seen corresponding path program 4 times [2021-11-13 01:39:10,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:10,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250895046] [2021-11-13 01:39:10,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:39:10,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:10,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:10,182 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:10,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-13 01:39:10,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:39:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:39:10,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:11,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:12,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:12,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250895046] [2021-11-13 01:39:12,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250895046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:12,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [387347002] [2021-11-13 01:39:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:39:12,456 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:12,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:12,457 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:12,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-13 01:39:13,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:39:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:39:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:14,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [387347002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:14,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008202946] [2021-11-13 01:39:14,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:39:14,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:14,313 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:14,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-13 01:39:14,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:39:14,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:39:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:15,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:16,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008202946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:16,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:39:16,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-13 01:39:16,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427415165] [2021-11-13 01:39:16,519 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:16,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 01:39:16,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 01:39:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:39:16,521 INFO L87 Difference]: Start difference. First operand 3189 states and 4207 transitions. Second operand has 20 states, 17 states have (on average 8.352941176470589) internal successors, (142), 20 states have internal predecessors, (142), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 01:39:18,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:20,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:22,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:24,949 WARN L515 Checker$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 01:39:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:26,676 INFO L93 Difference]: Finished difference Result 8140 states and 11242 transitions. [2021-11-13 01:39:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:39:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 8.352941176470589) internal successors, (142), 20 states have internal predecessors, (142), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 5 states have call successors, (21) Word has length 217 [2021-11-13 01:39:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:26,697 INFO L225 Difference]: With dead ends: 8140 [2021-11-13 01:39:26,698 INFO L226 Difference]: Without dead ends: 4960 [2021-11-13 01:39:26,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1299 GetRequests, 1278 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:39:26,709 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 304 mSDsluCounter, 4247 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 49 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9417.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 4664 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.21ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9624.90ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:26,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 4664 Invalid, 326 Unknown, 0 Unchecked, 8.21ms Time], IncrementalHoareTripleChecker [49 Valid, 273 Invalid, 4 Unknown, 0 Unchecked, 9624.90ms Time] [2021-11-13 01:39:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2021-11-13 01:39:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3204. [2021-11-13 01:39:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 2489 states have (on average 1.2748091603053435) internal successors, (3173), 2510 states have internal predecessors, (3173), 477 states have call successors, (477), 211 states have call predecessors, (477), 237 states have return successors, (587), 482 states have call predecessors, (587), 476 states have call successors, (587) [2021-11-13 01:39:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 4237 transitions. [2021-11-13 01:39:27,013 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 4237 transitions. Word has length 217 [2021-11-13 01:39:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:27,013 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 4237 transitions. [2021-11-13 01:39:27,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 8.352941176470589) internal successors, (142), 20 states have internal predecessors, (142), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 01:39:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 4237 transitions. [2021-11-13 01:39:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-13 01:39:27,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:27,023 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-11-13 01:39:27,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:27,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:27,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:27,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:27,646 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1860023780, now seen corresponding path program 5 times [2021-11-13 01:39:27,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:27,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036385705] [2021-11-13 01:39:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 01:39:27,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:27,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:27,649 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:27,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-13 01:39:31,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-13 01:39:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:39:32,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:32,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-13 01:39:34,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:34,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036385705] [2021-11-13 01:39:34,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036385705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:34,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1994881392] [2021-11-13 01:39:34,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 01:39:34,025 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:34,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:34,026 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:34,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a36f2b-f77a-4bdf-aac1-c21d83d47df2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process