./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:56:19,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:56:19,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:56:19,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:56:19,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:56:19,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:56:19,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:56:19,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:56:19,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:56:19,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:56:19,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:56:19,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:56:19,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:56:19,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:56:19,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:56:19,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:56:19,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:56:19,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:56:19,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:56:19,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:56:19,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:56:19,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:56:19,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:56:19,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:56:19,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:56:19,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:56:19,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:56:19,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:56:19,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:56:19,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:56:19,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:56:19,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:56:19,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:56:19,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:56:19,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:56:19,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:56:19,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:56:19,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:56:19,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:56:19,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:56:19,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:56:19,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:56:19,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:56:19,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:56:19,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:56:19,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:56:19,590 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:56:19,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:56:19,591 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:56:19,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:56:19,597 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:56:19,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:56:19,599 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:56:19,599 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:56:19,599 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:56:19,599 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:56:19,600 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:56:19,600 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:56:19,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:56:19,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:56:19,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:56:19,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:56:19,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:56:19,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:56:19,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:56:19,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:56:19,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:56:19,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:56:19,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:56:19,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:56:19,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:56:19,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:56:19,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:56:19,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:56:19,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:56:19,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:56:19,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:56:19,607 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:56:19,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:56:19,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:56:19,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:56:19,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:56:19,608 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-12 22:56:19,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:56:19,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:56:19,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:56:19,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:56:19,924 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:56:19,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-12 22:56:20,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/0e5c65d59/edeb10f36d0248369f607fd151224ca3/FLAGb5026bd48 [2021-11-12 22:56:20,644 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:56:20,650 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-12 22:56:20,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/0e5c65d59/edeb10f36d0248369f607fd151224ca3/FLAGb5026bd48 [2021-11-12 22:56:20,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/0e5c65d59/edeb10f36d0248369f607fd151224ca3 [2021-11-12 22:56:20,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:56:20,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:56:20,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:20,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:56:20,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:56:20,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:20" (1/1) ... [2021-11-12 22:56:20,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc7d636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:20, skipping insertion in model container [2021-11-12 22:56:20,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:20" (1/1) ... [2021-11-12 22:56:20,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:56:20,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:56:21,585 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-12 22:56:21,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:21,606 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:56:21,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a1d5ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:21, skipping insertion in model container [2021-11-12 22:56:21,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:21,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:56:21,609 INFO L158 Benchmark]: Toolchain (without parser) took 726.79ms. Allocated memory is still 90.2MB. Free memory was 53.4MB in the beginning and 54.4MB in the end (delta: -1.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:56:21,610 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 90.2MB. Free memory was 63.3MB in the beginning and 63.3MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:56:21,611 INFO L158 Benchmark]: CACSL2BoogieTranslator took 721.10ms. Allocated memory is still 90.2MB. Free memory was 53.1MB in the beginning and 54.4MB in the end (delta: -1.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:56:21,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 90.2MB. Free memory was 63.3MB in the beginning and 63.3MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 721.10ms. Allocated memory is still 90.2MB. Free memory was 53.1MB in the beginning and 54.4MB in the end (delta: -1.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1375]: 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:56:23,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:56:23,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:56:23,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:56:23,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:56:23,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:56:23,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:56:23,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:56:23,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:56:23,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:56:23,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:56:23,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:56:23,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:56:23,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:56:23,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:56:23,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:56:23,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:56:23,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:56:23,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:56:23,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:56:23,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:56:23,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:56:23,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:56:23,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:56:23,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:56:23,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:56:23,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:56:23,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:56:23,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:56:23,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:56:23,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:56:23,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:56:23,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:56:23,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:56:23,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:56:23,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:56:23,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:56:23,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:56:23,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:56:23,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:56:23,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:56:23,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:56:24,038 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:56:24,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:56:24,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:56:24,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:56:24,040 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:56:24,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:56:24,040 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:56:24,041 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:56:24,041 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:56:24,041 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:56:24,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:56:24,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:56:24,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:56:24,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:56:24,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:56:24,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:56:24,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:56:24,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:56:24,045 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:56:24,045 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:56:24,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:56:24,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:56:24,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:56:24,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:56:24,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:56:24,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:56:24,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:56:24,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:56:24,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:56:24,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:56:24,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:56:24,047 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:56:24,047 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:24,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:56:24,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:56:24,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:56:24,049 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-12 22:56:24,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:56:24,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:56:24,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:56:24,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:56:24,434 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:56:24,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-12 22:56:24,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/7ea49fc4d/2b8b69d3ae774b26887c396d410d5a0f/FLAGda25e80a0 [2021-11-12 22:56:25,219 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:56:25,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-12 22:56:25,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/7ea49fc4d/2b8b69d3ae774b26887c396d410d5a0f/FLAGda25e80a0 [2021-11-12 22:56:25,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/data/7ea49fc4d/2b8b69d3ae774b26887c396d410d5a0f [2021-11-12 22:56:25,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:56:25,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:56:25,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:25,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:56:25,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:56:25,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:25" (1/1) ... [2021-11-12 22:56:25,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b07cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:25, skipping insertion in model container [2021-11-12 22:56:25,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:25" (1/1) ... [2021-11-12 22:56:25,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:56:25,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:56:26,214 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-12 22:56:26,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:26,246 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:56:26,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:56:26,452 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-12 22:56:26,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:26,462 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:56:26,553 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_7a64f663-9c41-464c-87bc-8ba05f7ca13d/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-12 22:56:26,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:26,582 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:56:26,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26 WrapperNode [2021-11-12 22:56:26,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:26,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:56:26,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:56:26,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:56:26,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:56:26,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:56:26,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:56:26,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:56:26,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:56:26,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:56:26,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:56:26,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:56:26,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (1/1) ... [2021-11-12 22:56:26,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:56:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:56:26,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:56:26,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:56:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:56:26,919 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:56:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:56:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:56:26,920 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:56:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:56:26,920 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:56:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:56:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:56:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:56:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:56:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:56:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:56:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:56:26,922 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:56:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:56:26,922 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:56:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:56:26,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:56:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:56:26,923 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:56:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:56:26,923 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:56:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:56:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:56:26,924 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:56:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:56:26,924 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:56:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:56:26,924 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:56:26,924 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:56:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:56:26,925 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:56:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:56:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:56:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:56:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 22:56:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 22:56:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:56:26,927 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:56:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:56:26,927 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:56:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:56:26,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:56:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:56:26,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:56:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:56:26,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:56:30,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:56:30,745 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:56:30,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:56:30 BoogieIcfgContainer [2021-11-12 22:56:30,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:56:30,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:56:30,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:56:30,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:56:30,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:56:25" (1/3) ... [2021-11-12 22:56:30,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1fa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:56:30, skipping insertion in model container [2021-11-12 22:56:30,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:26" (2/3) ... [2021-11-12 22:56:30,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1fa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:56:30, skipping insertion in model container [2021-11-12 22:56:30,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:56:30" (3/3) ... [2021-11-12 22:56:30,759 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2021-11-12 22:56:30,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:56:30,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:56:30,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:56:30,848 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:56:30,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:56:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 402 states have (on average 1.681592039800995) internal successors, (676), 418 states have internal predecessors, (676), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:56:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:56:30,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:30,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:30,961 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1965651267, now seen corresponding path program 1 times [2021-11-12 22:56:30,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:30,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022800748] [2021-11-12 22:56:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:30,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:30,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:31,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:56:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:31,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:32,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:32,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022800748] [2021-11-12 22:56:32,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022800748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:32,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:32,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:56:32,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656616954] [2021-11-12 22:56:32,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:32,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:32,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:32,350 INFO L87 Difference]: Start difference. First operand has 517 states, 402 states have (on average 1.681592039800995) internal successors, (676), 418 states have internal predecessors, (676), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:56:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:32,590 INFO L93 Difference]: Finished difference Result 1029 states and 1718 transitions. [2021-11-12 22:56:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 101 [2021-11-12 22:56:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:32,629 INFO L225 Difference]: With dead ends: 1029 [2021-11-12 22:56:32,630 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 22:56:32,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:32,646 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 17 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.44ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:32,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3350 Invalid, 46 Unknown, 0 Unchecked, 27.44ms Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 50.48ms Time] [2021-11-12 22:56:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 22:56:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-12 22:56:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.6582914572864322) internal successors, (660), 413 states have internal predecessors, (660), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:56:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 841 transitions. [2021-11-12 22:56:32,760 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 841 transitions. Word has length 101 [2021-11-12 22:56:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:32,760 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 841 transitions. [2021-11-12 22:56:32,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:56:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 841 transitions. [2021-11-12 22:56:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:56:32,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:32,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:32,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:32,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1946474889, now seen corresponding path program 1 times [2021-11-12 22:56:32,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:32,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9795268] [2021-11-12 22:56:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:32,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:32,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:32,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:33,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:56:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:33,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:34,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:34,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9795268] [2021-11-12 22:56:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9795268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:34,223 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:34,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:56:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155430914] [2021-11-12 22:56:34,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:34,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:56:34,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:56:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:56:34,227 INFO L87 Difference]: Start difference. First operand 512 states and 841 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 22:56:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:34,467 INFO L93 Difference]: Finished difference Result 1012 states and 1674 transitions. [2021-11-12 22:56:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-12 22:56:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:34,474 INFO L225 Difference]: With dead ends: 1012 [2021-11-12 22:56:34,474 INFO L226 Difference]: Without dead ends: 521 [2021-11-12 22:56:34,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:34,480 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 118 mSDsluCounter, 5600 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6425 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.44ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:34,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6425 Invalid, 98 Unknown, 0 Unchecked, 13.44ms Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 153.10ms Time] [2021-11-12 22:56:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-12 22:56:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2021-11-12 22:56:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 406 states have (on average 1.6576354679802956) internal successors, (673), 422 states have internal predecessors, (673), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-12 22:56:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 855 transitions. [2021-11-12 22:56:34,533 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 855 transitions. Word has length 106 [2021-11-12 22:56:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:34,533 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 855 transitions. [2021-11-12 22:56:34,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 22:56:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 855 transitions. [2021-11-12 22:56:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 22:56:34,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:34,545 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:34,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:34,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:34,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 135549763, now seen corresponding path program 1 times [2021-11-12 22:56:34,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:34,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003260710] [2021-11-12 22:56:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:34,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:34,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:34,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:34,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:56:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:35,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:35,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:35,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003260710] [2021-11-12 22:56:35,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003260710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:35,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:35,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:56:35,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363850889] [2021-11-12 22:56:35,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:35,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:35,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:35,784 INFO L87 Difference]: Start difference. First operand 521 states and 855 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:56:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:36,068 INFO L93 Difference]: Finished difference Result 1068 states and 1765 transitions. [2021-11-12 22:56:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:36,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 107 [2021-11-12 22:56:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:36,074 INFO L225 Difference]: With dead ends: 1068 [2021-11-12 22:56:36,075 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 22:56:36,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:36,080 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 230 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.28ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:36,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2332 Invalid, 197 Unknown, 0 Unchecked, 7.28ms Time], IncrementalHoareTripleChecker [35 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 205.11ms Time] [2021-11-12 22:56:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 22:56:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 526. [2021-11-12 22:56:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 411 states have (on average 1.5961070559610706) internal successors, (656), 426 states have internal predecessors, (656), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:56:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 837 transitions. [2021-11-12 22:56:36,114 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 837 transitions. Word has length 107 [2021-11-12 22:56:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:36,114 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 837 transitions. [2021-11-12 22:56:36,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:56:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 837 transitions. [2021-11-12 22:56:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 22:56:36,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:36,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:36,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:36,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:36,333 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:36,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1956894120, now seen corresponding path program 1 times [2021-11-12 22:56:36,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:36,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982041227] [2021-11-12 22:56:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:36,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:36,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:36,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:36,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:56:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:37,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:37,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:37,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982041227] [2021-11-12 22:56:37,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982041227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:37,448 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:37,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:56:37,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539979589] [2021-11-12 22:56:37,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:37,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:56:37,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:56:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:37,451 INFO L87 Difference]: Start difference. First operand 526 states and 837 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:56:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:37,618 INFO L93 Difference]: Finished difference Result 1010 states and 1628 transitions. [2021-11-12 22:56:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:56:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 109 [2021-11-12 22:56:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:37,624 INFO L225 Difference]: With dead ends: 1010 [2021-11-12 22:56:37,624 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 22:56:37,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:37,629 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 137 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3987 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:37,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 3987 Invalid, 70 Unknown, 0 Unchecked, 8.49ms Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 111.64ms Time] [2021-11-12 22:56:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 22:56:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 505. [2021-11-12 22:56:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 390 states have (on average 1.6102564102564103) internal successors, (628), 405 states have internal predecessors, (628), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:56:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 809 transitions. [2021-11-12 22:56:37,656 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 809 transitions. Word has length 109 [2021-11-12 22:56:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:37,656 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 809 transitions. [2021-11-12 22:56:37,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:56:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 809 transitions. [2021-11-12 22:56:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:56:37,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:37,661 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:37,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:37,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:37,878 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash -85513482, now seen corresponding path program 1 times [2021-11-12 22:56:37,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:37,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307948732] [2021-11-12 22:56:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:37,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:37,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:37,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:37,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:56:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:38,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:39,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:39,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307948732] [2021-11-12 22:56:39,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307948732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:39,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:39,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:39,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640000963] [2021-11-12 22:56:39,130 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:39,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:39,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:39,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:39,132 INFO L87 Difference]: Start difference. First operand 505 states and 809 transitions. Second operand has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 22:56:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:39,432 INFO L93 Difference]: Finished difference Result 979 states and 1583 transitions. [2021-11-12 22:56:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:56:39,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 112 [2021-11-12 22:56:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:39,441 INFO L225 Difference]: With dead ends: 979 [2021-11-12 22:56:39,442 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 22:56:39,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:56:39,446 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 46 mSDsluCounter, 6090 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6856 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.18ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:39,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 6856 Invalid, 195 Unknown, 0 Unchecked, 15.18ms Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 198.99ms Time] [2021-11-12 22:56:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 22:56:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 507. [2021-11-12 22:56:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 392 states have (on average 1.6045918367346939) internal successors, (629), 407 states have internal predecessors, (629), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:56:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 810 transitions. [2021-11-12 22:56:39,473 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 810 transitions. Word has length 112 [2021-11-12 22:56:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:39,473 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 810 transitions. [2021-11-12 22:56:39,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 22:56:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 810 transitions. [2021-11-12 22:56:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:56:39,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:39,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:39,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:39,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:39,699 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1135066562, now seen corresponding path program 1 times [2021-11-12 22:56:39,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:39,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124659716] [2021-11-12 22:56:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:39,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:39,702 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:39,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:56:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:40,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:56:40,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:56:40,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:40,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124659716] [2021-11-12 22:56:40,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124659716] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:40,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:40,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:40,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21415136] [2021-11-12 22:56:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:40,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:40,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:40,854 INFO L87 Difference]: Start difference. First operand 507 states and 810 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:56:42,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:44,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:45,864 INFO L93 Difference]: Finished difference Result 975 states and 1601 transitions. [2021-11-12 22:56:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:45,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-12 22:56:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:45,870 INFO L225 Difference]: With dead ends: 975 [2021-11-12 22:56:45,871 INFO L226 Difference]: Without dead ends: 511 [2021-11-12 22:56:45,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:45,876 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 730 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4804.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.74ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4933.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:45,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1941 Invalid, 428 Unknown, 0 Unchecked, 9.74ms Time], IncrementalHoareTripleChecker [16 Valid, 410 Invalid, 2 Unknown, 0 Unchecked, 4933.24ms Time] [2021-11-12 22:56:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-12 22:56:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2021-11-12 22:56:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 395 states have (on average 1.6) internal successors, (632), 410 states have internal predecessors, (632), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-12 22:56:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 814 transitions. [2021-11-12 22:56:45,912 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 814 transitions. Word has length 113 [2021-11-12 22:56:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:45,919 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 814 transitions. [2021-11-12 22:56:45,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:56:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 814 transitions. [2021-11-12 22:56:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:56:45,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:45,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:45,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:46,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:46,144 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2061669059, now seen corresponding path program 1 times [2021-11-12 22:56:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:46,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984950394] [2021-11-12 22:56:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:46,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:46,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:46,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:56:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:56:46,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:56:47,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:47,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984950394] [2021-11-12 22:56:47,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984950394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:47,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:47,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:47,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340546718] [2021-11-12 22:56:47,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:47,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:47,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:47,291 INFO L87 Difference]: Start difference. First operand 511 states and 814 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:56:49,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:51,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:52,356 INFO L93 Difference]: Finished difference Result 984 states and 1608 transitions. [2021-11-12 22:56:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-12 22:56:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:52,362 INFO L225 Difference]: With dead ends: 984 [2021-11-12 22:56:52,362 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 22:56:52,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:52,367 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 730 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4806.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.95ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4957.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:52,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1942 Invalid, 430 Unknown, 0 Unchecked, 9.95ms Time], IncrementalHoareTripleChecker [14 Valid, 414 Invalid, 2 Unknown, 0 Unchecked, 4957.06ms Time] [2021-11-12 22:56:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 22:56:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 22:56:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 399 states have (on average 1.593984962406015) internal successors, (636), 414 states have internal predecessors, (636), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-12 22:56:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 819 transitions. [2021-11-12 22:56:52,394 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 819 transitions. Word has length 116 [2021-11-12 22:56:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:52,395 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 819 transitions. [2021-11-12 22:56:52,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:56:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 819 transitions. [2021-11-12 22:56:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:56:52,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:52,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:52,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:52,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:52,618 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash -427684002, now seen corresponding path program 1 times [2021-11-12 22:56:52,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:52,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884381757] [2021-11-12 22:56:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:52,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:52,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:52,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:56:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:53,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:56:53,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:56:53,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:53,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884381757] [2021-11-12 22:56:53,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884381757] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:53,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:53,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:53,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472957731] [2021-11-12 22:56:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:53,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:53,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:53,738 INFO L87 Difference]: Start difference. First operand 516 states and 819 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:56:55,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:57,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:58,750 INFO L93 Difference]: Finished difference Result 995 states and 1617 transitions. [2021-11-12 22:56:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-11-12 22:56:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:58,755 INFO L225 Difference]: With dead ends: 995 [2021-11-12 22:56:58,756 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 22:56:58,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:58,761 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 728 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4800.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.30ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4929.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:58,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1942 Invalid, 429 Unknown, 0 Unchecked, 10.30ms Time], IncrementalHoareTripleChecker [12 Valid, 415 Invalid, 2 Unknown, 0 Unchecked, 4929.59ms Time] [2021-11-12 22:56:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 22:56:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-12 22:56:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 404 states have (on average 1.5866336633663367) internal successors, (641), 419 states have internal predecessors, (641), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (93), 88 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-12 22:56:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 825 transitions. [2021-11-12 22:56:58,789 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 825 transitions. Word has length 119 [2021-11-12 22:56:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:58,790 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 825 transitions. [2021-11-12 22:56:58,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:56:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 825 transitions. [2021-11-12 22:56:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:56:58,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:58,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:58,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:59,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:59,019 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash -33723247, now seen corresponding path program 1 times [2021-11-12 22:56:59,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:59,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748482984] [2021-11-12 22:56:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:59,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:59,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:59,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:56:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:56:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:57:00,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:00,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748482984] [2021-11-12 22:57:00,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748482984] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:00,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:00,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:57:00,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642329936] [2021-11-12 22:57:00,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:00,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:00,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:00,199 INFO L87 Difference]: Start difference. First operand 522 states and 825 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:57:02,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:04,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:05,158 INFO L93 Difference]: Finished difference Result 1008 states and 1628 transitions. [2021-11-12 22:57:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2021-11-12 22:57:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:05,172 INFO L225 Difference]: With dead ends: 1008 [2021-11-12 22:57:05,172 INFO L226 Difference]: Without dead ends: 529 [2021-11-12 22:57:05,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:05,177 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 729 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4760.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.32ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4889.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:05,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1942 Invalid, 428 Unknown, 0 Unchecked, 8.32ms Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 2 Unknown, 0 Unchecked, 4889.64ms Time] [2021-11-12 22:57:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-12 22:57:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-12 22:57:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 410 states have (on average 1.578048780487805) internal successors, (647), 425 states have internal predecessors, (647), 91 states have call successors, (91), 28 states have call predecessors, (91), 27 states have return successors, (94), 88 states have call predecessors, (94), 90 states have call successors, (94) [2021-11-12 22:57:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 832 transitions. [2021-11-12 22:57:05,205 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 832 transitions. Word has length 122 [2021-11-12 22:57:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:05,206 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 832 transitions. [2021-11-12 22:57:05,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:57:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 832 transitions. [2021-11-12 22:57:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:57:05,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:05,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:05,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:05,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:05,425 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash -517842182, now seen corresponding path program 1 times [2021-11-12 22:57:05,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:05,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82578298] [2021-11-12 22:57:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:05,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:05,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:05,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:57:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:57:05,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:57:06,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:57:06,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:06,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82578298] [2021-11-12 22:57:06,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82578298] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:06,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:06,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-12 22:57:06,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62501213] [2021-11-12 22:57:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:06,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:57:06,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:57:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:57:06,805 INFO L87 Difference]: Start difference. First operand 529 states and 832 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:57:08,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:10,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:12,834 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:14,839 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:22,680 INFO L93 Difference]: Finished difference Result 1797 states and 2907 transitions. [2021-11-12 22:57:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:57:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2021-11-12 22:57:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:22,693 INFO L225 Difference]: With dead ends: 1797 [2021-11-12 22:57:22,693 INFO L226 Difference]: Without dead ends: 1311 [2021-11-12 22:57:22,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:57:22,699 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 1567 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 5560 mSolverCounterSat, 616 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14558.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 4788 SdHoareTripleChecker+Invalid, 6180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.09ms SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5560 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15515.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:22,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 4788 Invalid, 6180 Unknown, 0 Unchecked, 51.09ms Time], IncrementalHoareTripleChecker [616 Valid, 5560 Invalid, 4 Unknown, 0 Unchecked, 15515.12ms Time] [2021-11-12 22:57:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-11-12 22:57:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1089. [2021-11-12 22:57:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 822 states have (on average 1.5827250608272505) internal successors, (1301), 859 states have internal predecessors, (1301), 208 states have call successors, (208), 53 states have call predecessors, (208), 58 states have return successors, (233), 207 states have call predecessors, (233), 206 states have call successors, (233) [2021-11-12 22:57:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1742 transitions. [2021-11-12 22:57:22,812 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1742 transitions. Word has length 125 [2021-11-12 22:57:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:22,812 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1742 transitions. [2021-11-12 22:57:22,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 22:57:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1742 transitions. [2021-11-12 22:57:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:57:22,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:22,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:22,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:23,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:23,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1816075832, now seen corresponding path program 1 times [2021-11-12 22:57:23,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:23,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900429489] [2021-11-12 22:57:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:23,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:23,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:23,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:57:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:23,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:57:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:57:23,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:57:24,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:24,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900429489] [2021-11-12 22:57:24,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900429489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:24,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:24,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:57:24,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896950897] [2021-11-12 22:57:24,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:24,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:57:24,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:24,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:57:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:24,200 INFO L87 Difference]: Start difference. First operand 1089 states and 1742 transitions. Second operand has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:57:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:24,477 INFO L93 Difference]: Finished difference Result 2105 states and 3391 transitions. [2021-11-12 22:57:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:57:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 128 [2021-11-12 22:57:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:24,489 INFO L225 Difference]: With dead ends: 2105 [2021-11-12 22:57:24,489 INFO L226 Difference]: Without dead ends: 1049 [2021-11-12 22:57:24,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:57:24,497 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 85 mSDsluCounter, 4569 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 5335 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:24,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 5335 Invalid, 151 Unknown, 0 Unchecked, 7.29ms Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 170.31ms Time] [2021-11-12 22:57:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-11-12 22:57:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1046. [2021-11-12 22:57:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 790 states have (on average 1.589873417721519) internal successors, (1256), 826 states have internal predecessors, (1256), 202 states have call successors, (202), 50 states have call predecessors, (202), 53 states have return successors, (220), 200 states have call predecessors, (220), 200 states have call successors, (220) [2021-11-12 22:57:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1678 transitions. [2021-11-12 22:57:24,566 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1678 transitions. Word has length 128 [2021-11-12 22:57:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:24,566 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1678 transitions. [2021-11-12 22:57:24,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:57:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1678 transitions. [2021-11-12 22:57:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:57:24,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:24,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:24,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:24,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:24,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1895684408, now seen corresponding path program 1 times [2021-11-12 22:57:24,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:24,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403193951] [2021-11-12 22:57:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:24,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:24,792 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:24,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:57:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:57:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:57:25,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:57:26,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:26,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403193951] [2021-11-12 22:57:26,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403193951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:26,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:26,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-12 22:57:26,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033268861] [2021-11-12 22:57:26,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:26,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:26,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:57:26,139 INFO L87 Difference]: Start difference. First operand 1046 states and 1678 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:57:28,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:30,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:32,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:34,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:38,465 INFO L93 Difference]: Finished difference Result 2618 states and 4251 transitions. [2021-11-12 22:57:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:57:38,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2021-11-12 22:57:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:38,481 INFO L225 Difference]: With dead ends: 2618 [2021-11-12 22:57:38,481 INFO L226 Difference]: Without dead ends: 1612 [2021-11-12 22:57:38,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:57:38,490 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 1847 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 486 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11566.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.70ms SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12127.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:38,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1947 Valid, 1869 Invalid, 3196 Unknown, 0 Unchecked, 22.70ms Time], IncrementalHoareTripleChecker [486 Valid, 2706 Invalid, 4 Unknown, 0 Unchecked, 12127.28ms Time] [2021-11-12 22:57:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-12 22:57:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1571. [2021-11-12 22:57:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1176 states have (on average 1.5935374149659864) internal successors, (1874), 1233 states have internal predecessors, (1874), 313 states have call successors, (313), 72 states have call predecessors, (313), 81 states have return successors, (356), 314 states have call predecessors, (356), 310 states have call successors, (356) [2021-11-12 22:57:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2543 transitions. [2021-11-12 22:57:38,609 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2543 transitions. Word has length 131 [2021-11-12 22:57:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 2543 transitions. [2021-11-12 22:57:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:57:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2543 transitions. [2021-11-12 22:57:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:57:38,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:38,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:38,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:38,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:38,832 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2041019427, now seen corresponding path program 1 times [2021-11-12 22:57:38,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:38,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548917403] [2021-11-12 22:57:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:38,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:38,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:57:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:39,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:57:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:57:39,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:57:39,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:39,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548917403] [2021-11-12 22:57:39,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548917403] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:39,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:39,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 22:57:39,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092805086] [2021-11-12 22:57:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:39,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:39,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:57:39,950 INFO L87 Difference]: Start difference. First operand 1571 states and 2543 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:57:41,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:43,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:44,990 INFO L93 Difference]: Finished difference Result 4491 states and 7338 transitions. [2021-11-12 22:57:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2021-11-12 22:57:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:45,019 INFO L225 Difference]: With dead ends: 4491 [2021-11-12 22:57:45,019 INFO L226 Difference]: Without dead ends: 2960 [2021-11-12 22:57:45,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:45,034 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 636 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4767.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.30ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4889.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:45,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 2580 Invalid, 524 Unknown, 0 Unchecked, 7.30ms Time], IncrementalHoareTripleChecker [23 Valid, 499 Invalid, 2 Unknown, 0 Unchecked, 4889.46ms Time] [2021-11-12 22:57:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-11-12 22:57:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2945. [2021-11-12 22:57:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2186 states have (on average 1.5709057639524244) internal successors, (3434), 2296 states have internal predecessors, (3434), 604 states have call successors, (604), 144 states have call predecessors, (604), 154 states have return successors, (683), 599 states have call predecessors, (683), 598 states have call successors, (683) [2021-11-12 22:57:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4721 transitions. [2021-11-12 22:57:45,245 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4721 transitions. Word has length 132 [2021-11-12 22:57:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:45,245 INFO L470 AbstractCegarLoop]: Abstraction has 2945 states and 4721 transitions. [2021-11-12 22:57:45,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:57:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4721 transitions. [2021-11-12 22:57:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:57:45,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:45,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:45,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:45,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:45,471 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1072544168, now seen corresponding path program 1 times [2021-11-12 22:57:45,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:45,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607242686] [2021-11-12 22:57:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:45,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:45,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:45,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:57:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:57:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:57:46,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:57:46,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:46,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607242686] [2021-11-12 22:57:46,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607242686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:46,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:46,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-12 22:57:46,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814475125] [2021-11-12 22:57:46,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:46,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:57:46,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:57:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:57:46,460 INFO L87 Difference]: Start difference. First operand 2945 states and 4721 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:57:48,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:50,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:52,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:54,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:56,389 INFO L93 Difference]: Finished difference Result 8694 states and 14118 transitions. [2021-11-12 22:57:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:57:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 134 [2021-11-12 22:57:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:56,435 INFO L225 Difference]: With dead ends: 8694 [2021-11-12 22:57:56,435 INFO L226 Difference]: Without dead ends: 5789 [2021-11-12 22:57:56,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:56,458 INFO L933 BasicCegarLoop]: 1518 mSDtfsCounter, 1474 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9425.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 4448 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.83ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9671.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:56,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 4448 Invalid, 988 Unknown, 0 Unchecked, 12.83ms Time], IncrementalHoareTripleChecker [13 Valid, 971 Invalid, 4 Unknown, 0 Unchecked, 9671.24ms Time] [2021-11-12 22:57:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5789 states. [2021-11-12 22:57:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5789 to 5763. [2021-11-12 22:57:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 4278 states have (on average 1.5661524076671343) internal successors, (6700), 4497 states have internal predecessors, (6700), 1179 states have call successors, (1179), 285 states have call predecessors, (1179), 305 states have return successors, (1442), 1170 states have call predecessors, (1442), 1167 states have call successors, (1442) [2021-11-12 22:57:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 9321 transitions. [2021-11-12 22:57:56,931 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 9321 transitions. Word has length 134 [2021-11-12 22:57:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:56,932 INFO L470 AbstractCegarLoop]: Abstraction has 5763 states and 9321 transitions. [2021-11-12 22:57:56,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:57:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 9321 transitions. [2021-11-12 22:57:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:57:56,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:56,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:56,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:57,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:57,153 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 708955767, now seen corresponding path program 1 times [2021-11-12 22:57:57,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:57,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085819804] [2021-11-12 22:57:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:57,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:57,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:57,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:57:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:57:57,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:57:58,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:58,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085819804] [2021-11-12 22:57:58,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085819804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:58,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:58,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 22:57:58,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75188862] [2021-11-12 22:57:58,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:58,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:57:58,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:57:58,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:57:58,163 INFO L87 Difference]: Start difference. First operand 5763 states and 9321 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:57:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:58,502 INFO L93 Difference]: Finished difference Result 10344 states and 16342 transitions. [2021-11-12 22:57:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:57:58,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 134 [2021-11-12 22:57:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:58,608 INFO L225 Difference]: With dead ends: 10344 [2021-11-12 22:57:58,608 INFO L226 Difference]: Without dead ends: 6637 [2021-11-12 22:57:58,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:57:58,637 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 507 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:58,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 1304 Invalid, 7 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 17.14ms Time] [2021-11-12 22:57:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2021-11-12 22:57:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 6611. [2021-11-12 22:57:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6611 states, 4931 states have (on average 1.5238288379639018) internal successors, (7514), 5148 states have internal predecessors, (7514), 1275 states have call successors, (1275), 372 states have call predecessors, (1275), 404 states have return successors, (1627), 1274 states have call predecessors, (1627), 1257 states have call successors, (1627) [2021-11-12 22:57:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6611 states to 6611 states and 10416 transitions. [2021-11-12 22:57:59,154 INFO L78 Accepts]: Start accepts. Automaton has 6611 states and 10416 transitions. Word has length 134 [2021-11-12 22:57:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:59,155 INFO L470 AbstractCegarLoop]: Abstraction has 6611 states and 10416 transitions. [2021-11-12 22:57:59,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:57:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6611 states and 10416 transitions. [2021-11-12 22:57:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:57:59,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:59,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:59,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:59,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:59,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash 507131833, now seen corresponding path program 1 times [2021-11-12 22:57:59,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:59,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125540282] [2021-11-12 22:57:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:59,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:59,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:59,386 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:59,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:57:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:57:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:58:00,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:58:00,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:00,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125540282] [2021-11-12 22:58:00,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125540282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:00,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:00,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-12 22:58:00,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848816955] [2021-11-12 22:58:00,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:00,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:58:00,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:58:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:00,700 INFO L87 Difference]: Start difference. First operand 6611 states and 10416 transitions. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:58:02,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:04,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:06,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:08,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:11,027 INFO L93 Difference]: Finished difference Result 15505 states and 24658 transitions. [2021-11-12 22:58:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:58:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 134 [2021-11-12 22:58:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:11,096 INFO L225 Difference]: With dead ends: 15505 [2021-11-12 22:58:11,096 INFO L226 Difference]: Without dead ends: 11154 [2021-11-12 22:58:11,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:58:11,121 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 1200 mSDsluCounter, 3676 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 64 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9514.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 4556 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.13ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9774.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:11,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 4556 Invalid, 1247 Unknown, 0 Unchecked, 16.13ms Time], IncrementalHoareTripleChecker [64 Valid, 1179 Invalid, 4 Unknown, 0 Unchecked, 9774.19ms Time] [2021-11-12 22:58:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-11-12 22:58:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10906. [2021-11-12 22:58:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10906 states, 8189 states have (on average 1.5149590914641593) internal successors, (12406), 8525 states have internal predecessors, (12406), 2012 states have call successors, (2012), 621 states have call predecessors, (2012), 704 states have return successors, (2725), 2035 states have call predecessors, (2725), 1982 states have call successors, (2725) [2021-11-12 22:58:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10906 states to 10906 states and 17143 transitions. [2021-11-12 22:58:12,030 INFO L78 Accepts]: Start accepts. Automaton has 10906 states and 17143 transitions. Word has length 134 [2021-11-12 22:58:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:12,030 INFO L470 AbstractCegarLoop]: Abstraction has 10906 states and 17143 transitions. [2021-11-12 22:58:12,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:58:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10906 states and 17143 transitions. [2021-11-12 22:58:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:58:12,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:12,035 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:12,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:12,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:12,253 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash 292185497, now seen corresponding path program 1 times [2021-11-12 22:58:12,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:12,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85891007] [2021-11-12 22:58:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:12,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:12,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:12,256 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:12,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:58:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:58:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:58:13,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:58:13,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:13,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85891007] [2021-11-12 22:58:13,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85891007] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:13,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:13,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-12 22:58:13,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72357383] [2021-11-12 22:58:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:13,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:58:13,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:58:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:58:13,741 INFO L87 Difference]: Start difference. First operand 10906 states and 17143 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:58:15,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:17,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:19,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:21,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:23,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:25,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:30,776 INFO L93 Difference]: Finished difference Result 19572 states and 30854 transitions. [2021-11-12 22:58:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:58:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2021-11-12 22:58:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:30,831 INFO L225 Difference]: With dead ends: 19572 [2021-11-12 22:58:30,832 INFO L226 Difference]: Without dead ends: 11100 [2021-11-12 22:58:30,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:58:30,873 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1923 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 472 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15722.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.36ms SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16314.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:30,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 2447 Invalid, 3962 Unknown, 0 Unchecked, 21.36ms Time], IncrementalHoareTripleChecker [472 Valid, 3484 Invalid, 6 Unknown, 0 Unchecked, 16314.30ms Time] [2021-11-12 22:58:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11100 states. [2021-11-12 22:58:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11100 to 10850. [2021-11-12 22:58:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 8157 states have (on average 1.51501777614319) internal successors, (12358), 8493 states have internal predecessors, (12358), 1996 states have call successors, (1996), 613 states have call predecessors, (1996), 696 states have return successors, (2709), 2019 states have call predecessors, (2709), 1966 states have call successors, (2709) [2021-11-12 22:58:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 17063 transitions. [2021-11-12 22:58:31,571 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 17063 transitions. Word has length 136 [2021-11-12 22:58:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:31,572 INFO L470 AbstractCegarLoop]: Abstraction has 10850 states and 17063 transitions. [2021-11-12 22:58:31,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:58:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 17063 transitions. [2021-11-12 22:58:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:58:31,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:31,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:31,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:31,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:31,794 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1577666288, now seen corresponding path program 1 times [2021-11-12 22:58:31,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:31,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91878154] [2021-11-12 22:58:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:31,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:31,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:31,796 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:31,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:58:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:58:32,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:58:32,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:58:33,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91878154] [2021-11-12 22:58:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91878154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:33,370 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:33,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-12 22:58:33,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361297073] [2021-11-12 22:58:33,370 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:33,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:58:33,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:58:33,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:58:33,372 INFO L87 Difference]: Start difference. First operand 10850 states and 17063 transitions. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:58:35,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:37,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:39,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:41,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:46,349 INFO L93 Difference]: Finished difference Result 27858 states and 44210 transitions. [2021-11-12 22:58:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:58:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 139 [2021-11-12 22:58:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:46,467 INFO L225 Difference]: With dead ends: 27858 [2021-11-12 22:58:46,467 INFO L226 Difference]: Without dead ends: 19268 [2021-11-12 22:58:46,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:58:46,603 INFO L933 BasicCegarLoop]: 1096 mSDtfsCounter, 2065 mSDsluCounter, 5561 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 238 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11475.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 6657 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.91ms SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11919.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:46,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2077 Valid, 6657 Invalid, 3060 Unknown, 0 Unchecked, 23.91ms Time], IncrementalHoareTripleChecker [238 Valid, 2818 Invalid, 4 Unknown, 0 Unchecked, 11919.43ms Time] [2021-11-12 22:58:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-11-12 22:58:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 19146. [2021-11-12 22:58:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19146 states, 14445 states have (on average 1.4968501211491865) internal successors, (21622), 15015 states have internal predecessors, (21622), 3422 states have call successors, (3422), 1127 states have call predecessors, (3422), 1278 states have return successors, (4981), 3463 states have call predecessors, (4981), 3368 states have call successors, (4981) [2021-11-12 22:58:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19146 states to 19146 states and 30025 transitions. [2021-11-12 22:58:47,839 INFO L78 Accepts]: Start accepts. Automaton has 19146 states and 30025 transitions. Word has length 139 [2021-11-12 22:58:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:47,841 INFO L470 AbstractCegarLoop]: Abstraction has 19146 states and 30025 transitions. [2021-11-12 22:58:47,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:58:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 19146 states and 30025 transitions. [2021-11-12 22:58:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:58:47,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:47,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:47,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:48,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:48,070 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash -471256228, now seen corresponding path program 1 times [2021-11-12 22:58:48,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:48,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129495021] [2021-11-12 22:58:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:48,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:48,073 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:48,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:58:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:58:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:58:48,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:58:49,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:49,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129495021] [2021-11-12 22:58:49,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129495021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:49,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:49,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:58:49,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762564203] [2021-11-12 22:58:49,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:49,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:58:49,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:58:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:58:49,310 INFO L87 Difference]: Start difference. First operand 19146 states and 30025 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:58:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:50,582 INFO L93 Difference]: Finished difference Result 37470 states and 59454 transitions. [2021-11-12 22:58:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:58:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 146 [2021-11-12 22:58:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:50,814 INFO L225 Difference]: With dead ends: 37470 [2021-11-12 22:58:50,815 INFO L226 Difference]: Without dead ends: 19174 [2021-11-12 22:58:50,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:58:50,956 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 480 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 4091 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.88ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:50,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 4091 Invalid, 127 Unknown, 0 Unchecked, 6.88ms Time], IncrementalHoareTripleChecker [48 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 154.91ms Time] [2021-11-12 22:58:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-11-12 22:58:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 19154. [2021-11-12 22:58:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19154 states, 14449 states have (on average 1.4784414146307703) internal successors, (21362), 15023 states have internal predecessors, (21362), 3422 states have call successors, (3422), 1127 states have call predecessors, (3422), 1282 states have return successors, (4987), 3463 states have call predecessors, (4987), 3368 states have call successors, (4987) [2021-11-12 22:58:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19154 states to 19154 states and 29771 transitions. [2021-11-12 22:58:52,339 INFO L78 Accepts]: Start accepts. Automaton has 19154 states and 29771 transitions. Word has length 146 [2021-11-12 22:58:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:52,340 INFO L470 AbstractCegarLoop]: Abstraction has 19154 states and 29771 transitions. [2021-11-12 22:58:52,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:58:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 19154 states and 29771 transitions. [2021-11-12 22:58:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 22:58:52,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:52,346 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:52,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 22:58:52,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:52,561 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1516062679, now seen corresponding path program 1 times [2021-11-12 22:58:52,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:52,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944145273] [2021-11-12 22:58:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:52,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:52,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:52,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:52,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:58:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:58:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:58:53,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-12 22:58:53,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:53,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944145273] [2021-11-12 22:58:53,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944145273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:53,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:53,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 22:58:53,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807023288] [2021-11-12 22:58:53,692 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:53,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:58:53,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:58:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:58:53,693 INFO L87 Difference]: Start difference. First operand 19154 states and 29771 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 22:58:55,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:57,445 INFO L93 Difference]: Finished difference Result 35814 states and 56336 transitions. [2021-11-12 22:58:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:58:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 151 [2021-11-12 22:58:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:57,578 INFO L225 Difference]: With dead ends: 35814 [2021-11-12 22:58:57,579 INFO L226 Difference]: Without dead ends: 19426 [2021-11-12 22:58:57,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:57,727 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 1285 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2500.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.18ms SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2594.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:57,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1285 Valid, 3002 Invalid, 456 Unknown, 0 Unchecked, 8.18ms Time], IncrementalHoareTripleChecker [211 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2594.58ms Time] [2021-11-12 22:58:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19426 states. [2021-11-12 22:58:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19426 to 19304. [2021-11-12 22:58:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19304 states, 14533 states have (on average 1.475676047615771) internal successors, (21446), 15149 states have internal predecessors, (21446), 3470 states have call successors, (3470), 1151 states have call predecessors, (3470), 1300 states have return successors, (5155), 3463 states have call predecessors, (5155), 3416 states have call successors, (5155) [2021-11-12 22:58:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19304 states to 19304 states and 30071 transitions. [2021-11-12 22:58:59,007 INFO L78 Accepts]: Start accepts. Automaton has 19304 states and 30071 transitions. Word has length 151 [2021-11-12 22:58:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:59,008 INFO L470 AbstractCegarLoop]: Abstraction has 19304 states and 30071 transitions. [2021-11-12 22:58:59,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 22:58:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 19304 states and 30071 transitions. [2021-11-12 22:58:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:58:59,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:59,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:59,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:59,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:59,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash 488498054, now seen corresponding path program 1 times [2021-11-12 22:58:59,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:59,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042701719] [2021-11-12 22:58:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:59,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:59,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:59,232 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:59,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:58:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:58:59,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:59:00,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-12 22:59:01,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:01,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042701719] [2021-11-12 22:59:01,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042701719] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:01,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:01,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:59:01,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402559297] [2021-11-12 22:59:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:01,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:59:01,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:59:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:01,190 INFO L87 Difference]: Start difference. First operand 19304 states and 30071 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:59:03,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:08,189 INFO L93 Difference]: Finished difference Result 39221 states and 62286 transitions. [2021-11-12 22:59:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:59:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-11-12 22:59:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:08,317 INFO L225 Difference]: With dead ends: 39221 [2021-11-12 22:59:08,318 INFO L226 Difference]: Without dead ends: 22673 [2021-11-12 22:59:08,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:59:08,446 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 1977 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 326 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5002.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2062 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.26ms SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5490.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:08,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2062 Valid, 2490 Invalid, 2837 Unknown, 0 Unchecked, 23.26ms Time], IncrementalHoareTripleChecker [326 Valid, 2510 Invalid, 1 Unknown, 0 Unchecked, 5490.49ms Time] [2021-11-12 22:59:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22673 states. [2021-11-12 22:59:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22673 to 20633. [2021-11-12 22:59:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20633 states, 15607 states have (on average 1.4741462164413404) internal successors, (23007), 16241 states have internal predecessors, (23007), 3610 states have call successors, (3610), 1257 states have call predecessors, (3610), 1415 states have return successors, (5323), 3594 states have call predecessors, (5323), 3565 states have call successors, (5323) [2021-11-12 22:59:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20633 states to 20633 states and 31940 transitions. [2021-11-12 22:59:10,329 INFO L78 Accepts]: Start accepts. Automaton has 20633 states and 31940 transitions. Word has length 156 [2021-11-12 22:59:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:10,330 INFO L470 AbstractCegarLoop]: Abstraction has 20633 states and 31940 transitions. [2021-11-12 22:59:10,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:59:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 20633 states and 31940 transitions. [2021-11-12 22:59:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:59:10,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:10,336 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:10,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:10,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:10,666 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:10,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1190097928, now seen corresponding path program 1 times [2021-11-12 22:59:10,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:10,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669798137] [2021-11-12 22:59:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:10,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:10,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:10,668 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:10,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:59:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:59:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 22:59:11,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 22:59:12,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:12,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669798137] [2021-11-12 22:59:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669798137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:12,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-12 22:59:12,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675806171] [2021-11-12 22:59:12,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:59:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:59:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:12,392 INFO L87 Difference]: Start difference. First operand 20633 states and 31940 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-12 22:59:14,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:16,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:18,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:20,436 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:22,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:28,788 INFO L93 Difference]: Finished difference Result 41260 states and 64832 transitions. [2021-11-12 22:59:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:59:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) Word has length 156 [2021-11-12 22:59:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:28,859 INFO L225 Difference]: With dead ends: 41260 [2021-11-12 22:59:28,860 INFO L226 Difference]: Without dead ends: 10505 [2021-11-12 22:59:29,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:59:29,019 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 2302 mSDsluCounter, 2325 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 649 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14353.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 4943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.82ms SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14974.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:29,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2403 Valid, 3070 Invalid, 4943 Unknown, 0 Unchecked, 28.82ms Time], IncrementalHoareTripleChecker [649 Valid, 4289 Invalid, 5 Unknown, 0 Unchecked, 14974.81ms Time] [2021-11-12 22:59:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10505 states. [2021-11-12 22:59:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10505 to 10382. [2021-11-12 22:59:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10382 states, 8030 states have (on average 1.4841843088418432) internal successors, (11918), 8321 states have internal predecessors, (11918), 1629 states have call successors, (1629), 672 states have call predecessors, (1629), 722 states have return successors, (2253), 1590 states have call predecessors, (2253), 1614 states have call successors, (2253) [2021-11-12 22:59:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10382 states to 10382 states and 15800 transitions. [2021-11-12 22:59:29,724 INFO L78 Accepts]: Start accepts. Automaton has 10382 states and 15800 transitions. Word has length 156 [2021-11-12 22:59:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:29,725 INFO L470 AbstractCegarLoop]: Abstraction has 10382 states and 15800 transitions. [2021-11-12 22:59:29,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-12 22:59:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 10382 states and 15800 transitions. [2021-11-12 22:59:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-12 22:59:29,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:29,747 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:29,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:29,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:29,947 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 777184883, now seen corresponding path program 1 times [2021-11-12 22:59:29,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:29,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557059531] [2021-11-12 22:59:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:29,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:29,950 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:29,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:59:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1861 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:59:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2021-11-12 22:59:31,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2021-11-12 22:59:32,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:32,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557059531] [2021-11-12 22:59:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557059531] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:32,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:32,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 22:59:32,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967427127] [2021-11-12 22:59:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:32,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:59:32,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:59:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:32,810 INFO L87 Difference]: Start difference. First operand 10382 states and 15800 transitions. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:59:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:33,467 INFO L93 Difference]: Finished difference Result 20662 states and 32003 transitions. [2021-11-12 22:59:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 505 [2021-11-12 22:59:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:33,530 INFO L225 Difference]: With dead ends: 20662 [2021-11-12 22:59:33,530 INFO L226 Difference]: Without dead ends: 11100 [2021-11-12 22:59:33,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:33,594 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 67 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3889 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.33ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:33,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 3889 Invalid, 40 Unknown, 0 Unchecked, 5.33ms Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 40.50ms Time] [2021-11-12 22:59:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11100 states. [2021-11-12 22:59:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11100 to 10512. [2021-11-12 22:59:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10512 states, 8134 states have (on average 1.4779936070813868) internal successors, (12022), 8425 states have internal predecessors, (12022), 1629 states have call successors, (1629), 672 states have call predecessors, (1629), 748 states have return successors, (2297), 1616 states have call predecessors, (2297), 1614 states have call successors, (2297) [2021-11-12 22:59:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 15948 transitions. [2021-11-12 22:59:34,287 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 15948 transitions. Word has length 505 [2021-11-12 22:59:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:34,288 INFO L470 AbstractCegarLoop]: Abstraction has 10512 states and 15948 transitions. [2021-11-12 22:59:34,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:59:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 15948 transitions. [2021-11-12 22:59:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-12 22:59:34,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:34,379 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:34,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:34,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:34,580 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash 19234801, now seen corresponding path program 1 times [2021-11-12 22:59:34,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:34,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091053653] [2021-11-12 22:59:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:34,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:34,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:34,582 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:34,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:59:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1857 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:59:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 579 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-11-12 22:59:36,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 35 proven. 66 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-11-12 22:59:37,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:37,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091053653] [2021-11-12 22:59:37,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091053653] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:37,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:37,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-12 22:59:37,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678021411] [2021-11-12 22:59:37,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:37,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:37,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:37,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:59:37,475 INFO L87 Difference]: Start difference. First operand 10512 states and 15948 transitions. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-12 22:59:39,499 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:41,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:47,020 INFO L93 Difference]: Finished difference Result 30138 states and 46803 transitions. [2021-11-12 22:59:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:59:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 504 [2021-11-12 22:59:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:47,094 INFO L225 Difference]: With dead ends: 30138 [2021-11-12 22:59:47,094 INFO L226 Difference]: Without dead ends: 19418 [2021-11-12 22:59:47,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:59:47,134 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 2293 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 638 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7809.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.14ms SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8439.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:47,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2452 Valid, 2373 Invalid, 3910 Unknown, 0 Unchecked, 23.14ms Time], IncrementalHoareTripleChecker [638 Valid, 3270 Invalid, 2 Unknown, 0 Unchecked, 8439.50ms Time] [2021-11-12 22:59:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-11-12 22:59:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 18607. [2021-11-12 22:59:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18607 states, 14181 states have (on average 1.4689373104858614) internal successors, (20831), 14738 states have internal predecessors, (20831), 3021 states have call successors, (3021), 1261 states have call predecessors, (3021), 1404 states have return successors, (4601), 2987 states have call predecessors, (4601), 3002 states have call successors, (4601) [2021-11-12 22:59:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 28453 transitions. [2021-11-12 22:59:48,122 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 28453 transitions. Word has length 504 [2021-11-12 22:59:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:48,123 INFO L470 AbstractCegarLoop]: Abstraction has 18607 states and 28453 transitions. [2021-11-12 22:59:48,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-12 22:59:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 28453 transitions. [2021-11-12 22:59:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-12 22:59:48,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:48,152 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:48,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:48,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:48,353 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:48,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1657945311, now seen corresponding path program 1 times [2021-11-12 22:59:48,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:48,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738462152] [2021-11-12 22:59:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:48,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:48,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:48,356 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:48,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:59:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:59:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 717 proven. 27 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-12 22:59:50,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-12 22:59:51,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:51,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738462152] [2021-11-12 22:59:51,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738462152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:59:51,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171572139] [2021-11-12 22:59:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:51,601 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:59:51,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:59:51,602 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:59:51,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:59:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:59:52,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-12 22:59:53,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2021-11-12 22:59:54,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [171572139] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:54,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:59:54,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-12 22:59:54,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787894899] [2021-11-12 22:59:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:59:54,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:59:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:59:54,152 INFO L87 Difference]: Start difference. First operand 18607 states and 28453 transitions. Second operand has 9 states, 8 states have (on average 28.0) internal successors, (224), 9 states have internal predecessors, (224), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 22:59:56,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:59,426 INFO L93 Difference]: Finished difference Result 51591 states and 81138 transitions. [2021-11-12 22:59:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:59:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 28.0) internal successors, (224), 9 states have internal predecessors, (224), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 484 [2021-11-12 22:59:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:59,532 INFO L225 Difference]: With dead ends: 51591 [2021-11-12 22:59:59,532 INFO L226 Difference]: Without dead ends: 32498 [2021-11-12 22:59:59,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1944 GetRequests, 1912 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:59:59,611 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 736 mSDsluCounter, 7985 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3215.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 9255 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.56ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3411.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:59,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 9255 Invalid, 1306 Unknown, 0 Unchecked, 16.56ms Time], IncrementalHoareTripleChecker [117 Valid, 1188 Invalid, 1 Unknown, 0 Unchecked, 3411.39ms Time] [2021-11-12 22:59:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32498 states. [2021-11-12 23:00:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32498 to 31856. [2021-11-12 23:00:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31856 states, 24108 states have (on average 1.4769371163099385) internal successors, (35606), 25144 states have internal predecessors, (35606), 5376 states have call successors, (5376), 2147 states have call predecessors, (5376), 2371 states have return successors, (8262), 5324 states have call predecessors, (8262), 5347 states have call successors, (8262) [2021-11-12 23:00:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31856 states to 31856 states and 49244 transitions. [2021-11-12 23:00:01,403 INFO L78 Accepts]: Start accepts. Automaton has 31856 states and 49244 transitions. Word has length 484 [2021-11-12 23:00:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:01,404 INFO L470 AbstractCegarLoop]: Abstraction has 31856 states and 49244 transitions. [2021-11-12 23:00:01,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 28.0) internal successors, (224), 9 states have internal predecessors, (224), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 23:00:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 31856 states and 49244 transitions. [2021-11-12 23:00:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-12 23:00:01,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:01,453 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:01,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-12 23:00:01,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:01,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:01,857 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash 883918235, now seen corresponding path program 1 times [2021-11-12 23:00:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:01,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543100829] [2021-11-12 23:00:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:01,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:01,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:01,860 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:01,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:00:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:00:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 754 proven. 12 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-11-12 23:00:03,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 71 proven. 107 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-12 23:00:05,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:05,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543100829] [2021-11-12 23:00:05,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543100829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:05,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538441514] [2021-11-12 23:00:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:05,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:00:05,287 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:00:05,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 23:00:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:05,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:00:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-12 23:00:07,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-12 23:00:08,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538441514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:08,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314618951] [2021-11-12 23:00:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:08,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:00:08,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:00:08,598 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:00:08,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 23:00:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:00:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-12 23:00:09,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-12 23:00:11,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314618951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:11,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:00:11,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-12 23:00:11,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894055716] [2021-11-12 23:00:11,043 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:00:11,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-12 23:00:11,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-12 23:00:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:00:11,051 INFO L87 Difference]: Start difference. First operand 31856 states and 49244 transitions. Second operand has 27 states, 26 states have (on average 18.53846153846154) internal successors, (482), 24 states have internal predecessors, (482), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-12 23:00:13,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:15,087 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:17,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:19,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:21,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:23,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:53,772 INFO L93 Difference]: Finished difference Result 93394 states and 152382 transitions. [2021-11-12 23:00:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-12 23:00:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 18.53846153846154) internal successors, (482), 24 states have internal predecessors, (482), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) Word has length 486 [2021-11-12 23:00:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:54,044 INFO L225 Difference]: With dead ends: 93394 [2021-11-12 23:00:54,045 INFO L226 Difference]: Without dead ends: 61367 [2021-11-12 23:00:54,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3006 GetRequests, 2921 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-12 23:00:54,459 INFO L933 BasicCegarLoop]: 1986 mSDtfsCounter, 9495 mSDsluCounter, 6758 mSDsCounter, 0 mSdLazyCounter, 20165 mSolverCounterSat, 4492 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33399.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9495 SdHoareTripleChecker+Valid, 8744 SdHoareTripleChecker+Invalid, 24663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 110.87ms SdHoareTripleChecker+Time, 4492 IncrementalHoareTripleChecker+Valid, 20165 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36120.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:54,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9495 Valid, 8744 Invalid, 24663 Unknown, 0 Unchecked, 110.87ms Time], IncrementalHoareTripleChecker [4492 Valid, 20165 Invalid, 6 Unknown, 0 Unchecked, 36120.64ms Time] [2021-11-12 23:00:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61367 states. [2021-11-12 23:00:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61367 to 46214. [2021-11-12 23:00:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46214 states, 34742 states have (on average 1.439611997006505) internal successors, (50015), 36155 states have internal predecessors, (50015), 7738 states have call successors, (7738), 3427 states have call predecessors, (7738), 3733 states have return successors, (12203), 7587 states have call predecessors, (12203), 7710 states have call successors, (12203) [2021-11-12 23:00:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46214 states to 46214 states and 69956 transitions. [2021-11-12 23:00:57,629 INFO L78 Accepts]: Start accepts. Automaton has 46214 states and 69956 transitions. Word has length 486 [2021-11-12 23:00:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:57,630 INFO L470 AbstractCegarLoop]: Abstraction has 46214 states and 69956 transitions. [2021-11-12 23:00:57,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 18.53846153846154) internal successors, (482), 24 states have internal predecessors, (482), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-12 23:00:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 46214 states and 69956 transitions. [2021-11-12 23:00:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-12 23:00:57,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:57,649 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:57,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:57,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-12 23:00:58,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:58,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:58,250 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2062253718, now seen corresponding path program 1 times [2021-11-12 23:00:58,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:58,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297433993] [2021-11-12 23:00:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:58,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:58,253 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:58,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:00:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-12 23:00:59,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-12 23:01:00,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:00,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297433993] [2021-11-12 23:01:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297433993] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:00,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:00,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:01:00,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091904838] [2021-11-12 23:01:00,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:00,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:01:00,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:01:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:01:00,552 INFO L87 Difference]: Start difference. First operand 46214 states and 69956 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-12 23:01:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:03,813 INFO L93 Difference]: Finished difference Result 90662 states and 138949 transitions. [2021-11-12 23:01:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:01:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 502 [2021-11-12 23:01:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:04,027 INFO L225 Difference]: With dead ends: 90662 [2021-11-12 23:01:04,027 INFO L226 Difference]: Without dead ends: 47268 [2021-11-12 23:01:04,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:01:04,258 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 101 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:04,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2094 Invalid, 160 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 133.26ms Time] [2021-11-12 23:01:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47268 states. [2021-11-12 23:01:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47268 to 47268. [2021-11-12 23:01:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47268 states, 35718 states have (on average 1.4368945629654515) internal successors, (51323), 37131 states have internal predecessors, (51323), 7738 states have call successors, (7738), 3505 states have call predecessors, (7738), 3811 states have return successors, (12203), 7587 states have call predecessors, (12203), 7710 states have call successors, (12203) [2021-11-12 23:01:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47268 states to 47268 states and 71264 transitions. [2021-11-12 23:01:07,199 INFO L78 Accepts]: Start accepts. Automaton has 47268 states and 71264 transitions. Word has length 502 [2021-11-12 23:01:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:07,200 INFO L470 AbstractCegarLoop]: Abstraction has 47268 states and 71264 transitions. [2021-11-12 23:01:07,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-12 23:01:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 47268 states and 71264 transitions. [2021-11-12 23:01:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-12 23:01:07,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:07,229 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:07,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:07,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:07,437 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash -799213120, now seen corresponding path program 1 times [2021-11-12 23:01:07,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:07,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970943582] [2021-11-12 23:01:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:07,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:07,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:07,440 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:07,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a64f663-9c41-464c-87bc-8ba05f7ca13d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:01:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:08,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:01:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-11-12 23:01:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-11-12 23:01:09,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:09,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970943582] [2021-11-12 23:01:09,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970943582] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:09,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:09,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:01:09,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693013553] [2021-11-12 23:01:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:09,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:01:09,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:01:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:01:09,841 INFO L87 Difference]: Start difference. First operand 47268 states and 71264 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-12 23:01:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:13,223 INFO L93 Difference]: Finished difference Result 93102 states and 142155 transitions. [2021-11-12 23:01:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:01:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 507 [2021-11-12 23:01:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:13,429 INFO L225 Difference]: With dead ends: 93102 [2021-11-12 23:01:13,429 INFO L226 Difference]: Without dead ends: 48750 [2021-11-12 23:01:13,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:01:13,612 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 99 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:13,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 2107 Invalid, 164 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 146.52ms Time] [2021-11-12 23:01:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48750 states.