./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.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_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/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_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/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_de872e98-68f4-4c3f-8654-d37e369767d5/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 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:12,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:12,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:12,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:12,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:12,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:12,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:12,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:12,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:12,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:12,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:12,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:12,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:12,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:12,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:12,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:12,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:12,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:12,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:12,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:12,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:12,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:12,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:12,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:12,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:12,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:12,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:12,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:12,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:12,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:12,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:12,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:12,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:12,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:12,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:12,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:12,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:12,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:12,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:12,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:12,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:12,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:43:12,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:12,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:12,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:12,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:12,487 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:12,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:12,488 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:12,488 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:43:12,488 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:12,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:12,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:43:12,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:43:12,491 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:12,492 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:43:12,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:43:12,493 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:43:12,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:12,494 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:43:12,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:43:12,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:43:12,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:12,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:12,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:12,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:12,497 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:12,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:43:12,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:12,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:12,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:12,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:12,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:12,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:12,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:12,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:12,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:12,504 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:43:12,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:43:12,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:12,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:12,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:12,506 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_de872e98-68f4-4c3f-8654-d37e369767d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 [2021-11-12 23:43:12,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:12,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:43:12,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:43:12,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:43:12,942 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:43:12,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2021-11-12 23:43:13,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/e5107a004/9923e7d492ab4253857fe3225f096126/FLAGb730feb25 [2021-11-12 23:43:14,055 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:43:14,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2021-11-12 23:43:14,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/e5107a004/9923e7d492ab4253857fe3225f096126/FLAGb730feb25 [2021-11-12 23:43:14,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/e5107a004/9923e7d492ab4253857fe3225f096126 [2021-11-12 23:43:14,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:43:14,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:43:14,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:14,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:43:14,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:43:14,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:14" (1/1) ... [2021-11-12 23:43:14,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d245ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:14, skipping insertion in model container [2021-11-12 23:43:14,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:14" (1/1) ... [2021-11-12 23:43:14,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:43:14,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:15,591 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_de872e98-68f4-4c3f-8654-d37e369767d5/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2021-11-12 23:43:15,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:15,782 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 23:43:15,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fe63011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:15, skipping insertion in model container [2021-11-12 23:43:15,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:15,784 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:43:15,787 INFO L158 Benchmark]: Toolchain (without parser) took 1151.56ms. Allocated memory is still 115.3MB. Free memory was 77.7MB in the beginning and 76.1MB in the end (delta: 1.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:43:15,789 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 115.3MB. Free memory was 89.4MB in the beginning and 89.3MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:43:15,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1138.93ms. Allocated memory is still 115.3MB. Free memory was 77.5MB in the beginning and 76.1MB in the end (delta: 1.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:43:15,793 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 115.3MB. Free memory was 89.4MB in the beginning and 89.3MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1138.93ms. Allocated memory is still 115.3MB. Free memory was 77.5MB in the beginning and 76.1MB in the end (delta: 1.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1769]: 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_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/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_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/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_de872e98-68f4-4c3f-8654-d37e369767d5/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 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:19,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:19,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:19,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:19,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:19,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:19,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:19,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:19,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:19,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:19,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:19,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:19,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:19,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:19,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:19,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:19,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:19,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:19,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:19,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:19,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:19,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:19,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:19,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:19,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:19,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:19,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:19,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:19,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:19,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:19,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:19,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:19,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:19,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:19,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:19,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:19,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:19,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:19,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:19,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:19,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:19,634 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:43:19,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:19,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:19,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:19,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:19,675 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:19,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:19,676 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:19,676 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:19,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:19,677 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:19,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:19,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:43:19,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:43:19,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:19,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:19,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:19,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:19,681 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:19,682 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:43:19,682 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:43:19,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:43:19,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:19,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:19,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:19,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:19,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:43:19,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:19,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:19,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:19,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:19,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:19,687 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:43:19,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:19,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:19,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:19,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:19,688 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_de872e98-68f4-4c3f-8654-d37e369767d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 [2021-11-12 23:43:20,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:20,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:43:20,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:43:20,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:43:20,392 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:43:20,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2021-11-12 23:43:20,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/541146abf/5a7de003df7e409e8970ce7c1f8da577/FLAGc8e4831db [2021-11-12 23:43:21,627 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:43:21,633 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2021-11-12 23:43:21,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/541146abf/5a7de003df7e409e8970ce7c1f8da577/FLAGc8e4831db [2021-11-12 23:43:22,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/data/541146abf/5a7de003df7e409e8970ce7c1f8da577 [2021-11-12 23:43:22,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:43:22,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:43:22,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:22,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:43:22,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:43:22,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:22" (1/1) ... [2021-11-12 23:43:22,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3a3f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:22, skipping insertion in model container [2021-11-12 23:43:22,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:22" (1/1) ... [2021-11-12 23:43:22,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:43:22,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:23,330 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_de872e98-68f4-4c3f-8654-d37e369767d5/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2021-11-12 23:43:23,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:23,511 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:43:23,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:23,732 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_de872e98-68f4-4c3f-8654-d37e369767d5/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2021-11-12 23:43:23,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:23,773 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:43:23,920 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_de872e98-68f4-4c3f-8654-d37e369767d5/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2021-11-12 23:43:23,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:23,989 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:43:23,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23 WrapperNode [2021-11-12 23:43:23,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:23,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:23,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:43:23,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:43:24,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:24,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:43:24,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:43:24,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:43:24,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:43:24,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:43:24,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:43:24,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:43:24,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (1/1) ... [2021-11-12 23:43:24,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:24,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:43:24,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:43:24,470 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:43:24,471 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:43:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:43:24,472 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:43:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:43:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-12 23:43:24,473 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-12 23:43:24,473 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:43:24,473 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:43:24,474 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:43:24,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:43:24,474 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:43:24,474 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:43:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:43:24,475 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:43:24,475 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:43:24,476 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:43:24,476 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:43:24,476 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:43:24,476 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:43:24,477 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:43:24,477 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:43:24,477 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:43:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:43:24,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:43:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:43:24,478 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:43:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:43:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:43:24,479 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:43:24,480 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:43:24,480 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:43:24,480 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:43:24,480 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:43:24,481 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:43:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:43:24,481 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:43:24,482 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:43:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:43:24,482 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:43:24,482 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:43:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:43:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:43:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:43:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:43:24,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:43:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:43:24,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:43:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:43:24,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:43:29,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:43:29,486 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:43:29,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:43:29 BoogieIcfgContainer [2021-11-12 23:43:29,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:43:29,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:43:29,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:43:29,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:43:29,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:43:22" (1/3) ... [2021-11-12 23:43:29,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8479e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:43:29, skipping insertion in model container [2021-11-12 23:43:29,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:23" (2/3) ... [2021-11-12 23:43:29,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8479e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:43:29, skipping insertion in model container [2021-11-12 23:43:29,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:43:29" (3/3) ... [2021-11-12 23:43:29,517 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2021-11-12 23:43:29,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:43:29,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:43:29,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:43:29,650 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 23:43:29,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:43:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 532 states, 414 states have (on average 1.6763285024154588) internal successors, (694), 430 states have internal predecessors, (694), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:43:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:43:29,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:29,798 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 23:43:29,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash 124463842, now seen corresponding path program 1 times [2021-11-12 23:43:29,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:29,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001596480] [2021-11-12 23:43:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:29,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:29,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:29,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:43:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:43:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:31,374 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 23:43:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:31,864 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 23:43:31,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:31,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001596480] [2021-11-12 23:43:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001596480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:31,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:31,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:43:31,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124483567] [2021-11-12 23:43:31,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:31,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:43:31,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:43:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:43:31,932 INFO L87 Difference]: Start difference. First operand has 532 states, 414 states have (on average 1.6763285024154588) internal successors, (694), 430 states have internal predecessors, (694), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) 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 23:43:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:32,288 INFO L93 Difference]: Finished difference Result 1059 states and 1762 transitions. [2021-11-12 23:43:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:32,298 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 23:43:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:32,322 INFO L225 Difference]: With dead ends: 1059 [2021-11-12 23:43:32,322 INFO L226 Difference]: Without dead ends: 527 [2021-11-12 23:43:32,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:43:32,347 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 16 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4296 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:32,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 4296 Invalid, 55 Unknown, 0 Unchecked, 58.78ms Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 74.30ms Time] [2021-11-12 23:43:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-12 23:43:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2021-11-12 23:43:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 410 states have (on average 1.6536585365853658) internal successors, (678), 425 states have internal predecessors, (678), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 23:43:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 863 transitions. [2021-11-12 23:43:32,523 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 863 transitions. Word has length 101 [2021-11-12 23:43:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:32,525 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 863 transitions. [2021-11-12 23:43:32,525 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 23:43:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 863 transitions. [2021-11-12 23:43:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:43:32,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:32,550 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 23:43:32,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:32,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:32,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 699466523, now seen corresponding path program 1 times [2021-11-12 23:43:32,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:32,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782723391] [2021-11-12 23:43:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:32,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:32,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:32,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:43:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:43:33,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:34,006 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 23:43:34,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:34,769 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 23:43:34,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:34,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782723391] [2021-11-12 23:43:34,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782723391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:34,771 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:34,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:43:34,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112543834] [2021-11-12 23:43:34,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:34,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:43:34,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:43:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:43:34,787 INFO L87 Difference]: Start difference. First operand 527 states and 863 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 23:43:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:35,199 INFO L93 Difference]: Finished difference Result 1042 states and 1718 transitions. [2021-11-12 23:43:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:43:35,202 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 23:43:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:35,211 INFO L225 Difference]: With dead ends: 1042 [2021-11-12 23:43:35,212 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 23:43:35,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:43:35,225 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 118 mSDsluCounter, 5757 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6604 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.38ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:35,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6604 Invalid, 98 Unknown, 0 Unchecked, 31.38ms Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 242.31ms Time] [2021-11-12 23:43:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 23:43:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2021-11-12 23:43:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 418 states have (on average 1.6531100478468899) internal successors, (691), 434 states have internal predecessors, (691), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 23:43:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 877 transitions. [2021-11-12 23:43:35,300 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 877 transitions. Word has length 106 [2021-11-12 23:43:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:35,302 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 877 transitions. [2021-11-12 23:43:35,303 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 23:43:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 877 transitions. [2021-11-12 23:43:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:43:35,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:35,315 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 23:43:35,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:35,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:35,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2127430572, now seen corresponding path program 1 times [2021-11-12 23:43:35,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:35,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098866358] [2021-11-12 23:43:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:35,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:35,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:35,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:43:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:43:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:36,721 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 23:43:36,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:37,294 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 23:43:37,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:37,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098866358] [2021-11-12 23:43:37,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098866358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:37,295 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:37,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:43:37,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658036653] [2021-11-12 23:43:37,295 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:43:37,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:43:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:43:37,298 INFO L87 Difference]: Start difference. First operand 536 states and 877 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 23:43:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:37,703 INFO L93 Difference]: Finished difference Result 1098 states and 1809 transitions. [2021-11-12 23:43:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:37,706 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 23:43:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:37,718 INFO L225 Difference]: With dead ends: 1098 [2021-11-12 23:43:37,718 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 23:43:37,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:43:37,731 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 263 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.01ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:37,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1616 Invalid, 169 Unknown, 0 Unchecked, 10.01ms Time], IncrementalHoareTripleChecker [41 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 295.19ms Time] [2021-11-12 23:43:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 23:43:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 541. [2021-11-12 23:43:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 423 states have (on average 1.5933806146572105) internal successors, (674), 438 states have internal predecessors, (674), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 23:43:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 859 transitions. [2021-11-12 23:43:37,800 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 859 transitions. Word has length 107 [2021-11-12 23:43:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:37,801 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 859 transitions. [2021-11-12 23:43:37,802 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 23:43:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 859 transitions. [2021-11-12 23:43:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:43:37,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:37,819 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 23:43:37,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:38,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:38,034 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash -3668175, now seen corresponding path program 1 times [2021-11-12 23:43:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:38,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44660519] [2021-11-12 23:43:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:38,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:38,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:38,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:38,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:43:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:43:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:39,184 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 23:43:39,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:39,762 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 23:43:39,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:39,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44660519] [2021-11-12 23:43:39,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44660519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:39,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:39,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:43:39,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733809369] [2021-11-12 23:43:39,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:39,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:43:39,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:39,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:43:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:43:39,778 INFO L87 Difference]: Start difference. First operand 541 states and 859 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 23:43:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:40,138 INFO L93 Difference]: Finished difference Result 1040 states and 1672 transitions. [2021-11-12 23:43:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:43:40,142 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 23:43:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:40,150 INFO L225 Difference]: With dead ends: 1040 [2021-11-12 23:43:40,151 INFO L226 Difference]: Without dead ends: 529 [2021-11-12 23:43:40,163 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 23:43:40,169 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 86 mSDsluCounter, 4813 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:40,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5641 Invalid, 80 Unknown, 0 Unchecked, 22.45ms Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 215.80ms Time] [2021-11-12 23:43:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-12 23:43:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 520. [2021-11-12 23:43:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 402 states have (on average 1.6069651741293531) internal successors, (646), 417 states have internal predecessors, (646), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 23:43:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 831 transitions. [2021-11-12 23:43:40,219 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 831 transitions. Word has length 109 [2021-11-12 23:43:40,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:40,220 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 831 transitions. [2021-11-12 23:43:40,220 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 23:43:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 831 transitions. [2021-11-12 23:43:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:43:40,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:40,228 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 23:43:40,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:40,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:40,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash 556940584, now seen corresponding path program 1 times [2021-11-12 23:43:40,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:40,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808661104] [2021-11-12 23:43:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:40,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:40,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:40,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:40,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:43:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:43:40,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:41,324 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 23:43:41,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:42,207 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 23:43:42,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:42,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808661104] [2021-11-12 23:43:42,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808661104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:42,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:42,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:43:42,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648563589] [2021-11-12 23:43:42,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:42,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:43:42,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:43:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:43:42,212 INFO L87 Difference]: Start difference. First operand 520 states and 831 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 23:43:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:42,701 INFO L93 Difference]: Finished difference Result 1009 states and 1627 transitions. [2021-11-12 23:43:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:43:42,704 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 23:43:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:42,713 INFO L225 Difference]: With dead ends: 1009 [2021-11-12 23:43:42,713 INFO L226 Difference]: Without dead ends: 525 [2021-11-12 23:43:42,719 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 23:43:42,721 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 74 mSDsluCounter, 5483 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6271 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.84ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 326.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:42,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 6271 Invalid, 179 Unknown, 0 Unchecked, 21.84ms Time], IncrementalHoareTripleChecker [4 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 326.42ms Time] [2021-11-12 23:43:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-12 23:43:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 522. [2021-11-12 23:43:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 404 states have (on average 1.6014851485148516) internal successors, (647), 419 states have internal predecessors, (647), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 23:43:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 832 transitions. [2021-11-12 23:43:42,776 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 832 transitions. Word has length 112 [2021-11-12 23:43:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:42,779 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 832 transitions. [2021-11-12 23:43:42,780 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 23:43:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 832 transitions. [2021-11-12 23:43:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:43:42,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:42,786 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 23:43:42,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:43,000 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1570740619, now seen corresponding path program 1 times [2021-11-12 23:43:43,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:43,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280612629] [2021-11-12 23:43:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:43,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:43,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:43,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:43:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:43,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:43:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:44,174 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 23:43:44,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:44,772 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 23:43:44,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:44,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280612629] [2021-11-12 23:43:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280612629] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:43:44,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:43:44,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:43:44,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862558522] [2021-11-12 23:43:44,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:44,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:43:44,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:43:44,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:43:44,776 INFO L87 Difference]: Start difference. First operand 522 states and 832 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 23:43:46,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:48,831 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 23:43:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:50,456 INFO L93 Difference]: Finished difference Result 1005 states and 1645 transitions. [2021-11-12 23:43:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:50,459 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 23:43:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:50,465 INFO L225 Difference]: With dead ends: 1005 [2021-11-12 23:43:50,465 INFO L226 Difference]: Without dead ends: 526 [2021-11-12 23:43:50,473 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 23:43:50,474 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 764 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5291.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.87ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5537.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:50,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1999 Invalid, 436 Unknown, 0 Unchecked, 21.87ms Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 2 Unknown, 0 Unchecked, 5537.39ms Time] [2021-11-12 23:43:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-12 23:43:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-12 23:43:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 407 states have (on average 1.597051597051597) internal successors, (650), 422 states have internal predecessors, (650), 93 states have call successors, (93), 26 states have call predecessors, (93), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 23:43:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 836 transitions. [2021-11-12 23:43:50,527 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 836 transitions. Word has length 113 [2021-11-12 23:43:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:50,528 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 836 transitions. [2021-11-12 23:43:50,528 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 23:43:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 836 transitions. [2021-11-12 23:43:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:43:50,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:50,535 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 23:43:50,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:50,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:50,751 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1737079226, now seen corresponding path program 1 times [2021-11-12 23:43:50,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:50,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362445618] [2021-11-12 23:43:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:50,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:50,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:50,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:43:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:43:51,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:52,155 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 23:43:52,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:52,793 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 23:43:52,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:52,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362445618] [2021-11-12 23:43:52,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362445618] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:43:52,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:43:52,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:43:52,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712800410] [2021-11-12 23:43:52,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:52,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:43:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:43:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:43:52,796 INFO L87 Difference]: Start difference. First operand 526 states and 836 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 23:43:54,830 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 23:43:56,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:58,354 INFO L93 Difference]: Finished difference Result 1014 states and 1652 transitions. [2021-11-12 23:43:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:58,355 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 23:43:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:58,361 INFO L225 Difference]: With dead ends: 1014 [2021-11-12 23:43:58,362 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:43:58,368 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 23:43:58,369 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 752 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5227.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.56ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5420.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:58,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 2000 Invalid, 438 Unknown, 0 Unchecked, 13.56ms Time], IncrementalHoareTripleChecker [14 Valid, 422 Invalid, 2 Unknown, 0 Unchecked, 5420.02ms Time] [2021-11-12 23:43:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:43:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:43:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 411 states have (on average 1.5912408759124088) internal successors, (654), 426 states have internal predecessors, (654), 93 states have call successors, (93), 27 states have call predecessors, (93), 26 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-12 23:43:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 841 transitions. [2021-11-12 23:43:58,419 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 841 transitions. Word has length 116 [2021-11-12 23:43:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:58,420 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 841 transitions. [2021-11-12 23:43:58,420 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 23:43:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 841 transitions. [2021-11-12 23:43:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:43:58,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:58,427 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 23:43:58,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:58,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:58,641 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:58,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:58,642 INFO L85 PathProgramCache]: Analyzing trace with hash -707949785, now seen corresponding path program 1 times [2021-11-12 23:43:58,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:58,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523105356] [2021-11-12 23:43:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:58,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:58,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:58,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:43:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:43:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:59,682 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 23:43:59,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:00,326 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 23:44:00,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:00,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523105356] [2021-11-12 23:44:00,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523105356] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:00,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:44:00,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135153196] [2021-11-12 23:44:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:00,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:44:00,330 INFO L87 Difference]: Start difference. First operand 531 states and 841 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 23:44:02,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:04,386 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 23:44:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:05,815 INFO L93 Difference]: Finished difference Result 1025 states and 1661 transitions. [2021-11-12 23:44:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:05,816 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 23:44:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:05,825 INFO L225 Difference]: With dead ends: 1025 [2021-11-12 23:44:05,825 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:44:05,834 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 23:44:05,835 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 750 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5139.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.95ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5362.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:05,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 2000 Invalid, 437 Unknown, 0 Unchecked, 12.95ms Time], IncrementalHoareTripleChecker [12 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 5362.56ms Time] [2021-11-12 23:44:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:44:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:44:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 416 states have (on average 1.5841346153846154) internal successors, (659), 431 states have internal predecessors, (659), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-12 23:44:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 847 transitions. [2021-11-12 23:44:05,885 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 847 transitions. Word has length 119 [2021-11-12 23:44:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:05,885 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 847 transitions. [2021-11-12 23:44:05,886 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 23:44:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 847 transitions. [2021-11-12 23:44:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:44:05,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:05,893 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 23:44:05,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:06,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:06,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash -251953766, now seen corresponding path program 1 times [2021-11-12 23:44:06,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:06,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788952241] [2021-11-12 23:44:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:06,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:06,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:06,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:44:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:06,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:07,296 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 23:44:07,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:07,937 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 23:44:07,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:07,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788952241] [2021-11-12 23:44:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788952241] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:07,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:07,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:44:07,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316421011] [2021-11-12 23:44:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:07,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:07,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:44:07,941 INFO L87 Difference]: Start difference. First operand 537 states and 847 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 23:44:09,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:11,977 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 23:44:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:13,245 INFO L93 Difference]: Finished difference Result 1038 states and 1672 transitions. [2021-11-12 23:44:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:13,246 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 23:44:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:13,253 INFO L225 Difference]: With dead ends: 1038 [2021-11-12 23:44:13,254 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 23:44:13,260 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 23:44:13,261 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 751 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5007.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.68ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5212.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:13,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 2000 Invalid, 436 Unknown, 0 Unchecked, 11.68ms Time], IncrementalHoareTripleChecker [10 Valid, 424 Invalid, 2 Unknown, 0 Unchecked, 5212.88ms Time] [2021-11-12 23:44:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 23:44:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 23:44:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 422 states have (on average 1.5758293838862558) internal successors, (665), 437 states have internal predecessors, (665), 93 states have call successors, (93), 29 states have call predecessors, (93), 28 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-12 23:44:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 854 transitions. [2021-11-12 23:44:13,310 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 854 transitions. Word has length 122 [2021-11-12 23:44:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:13,311 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 854 transitions. [2021-11-12 23:44:13,311 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 23:44:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 854 transitions. [2021-11-12 23:44:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:44:13,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:13,319 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 23:44:13,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:13,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:13,532 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash 156595907, now seen corresponding path program 1 times [2021-11-12 23:44:13,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:13,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044783832] [2021-11-12 23:44:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:13,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:13,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:13,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:44:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:14,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:44:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:14,698 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 23:44:14,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:15,605 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 23:44:15,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:15,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044783832] [2021-11-12 23:44:15,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044783832] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:15,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:15,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-12 23:44:15,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351865618] [2021-11-12 23:44:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:15,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:44:15,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:44:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:44:15,609 INFO L87 Difference]: Start difference. First operand 544 states and 854 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 23:44:17,642 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 23:44:19,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:21,655 WARN L515 Checker$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 23:44:23,661 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 23:44:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:31,373 INFO L93 Difference]: Finished difference Result 1842 states and 2973 transitions. [2021-11-12 23:44:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:44:31,374 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 23:44:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:31,391 INFO L225 Difference]: With dead ends: 1842 [2021-11-12 23:44:31,392 INFO L226 Difference]: Without dead ends: 1341 [2021-11-12 23:44:31,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:44:31,398 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 1615 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 4750 mSolverCounterSat, 627 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14391.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 4296 SdHoareTripleChecker+Invalid, 5381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.82ms SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 4750 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15417.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:31,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 4296 Invalid, 5381 Unknown, 0 Unchecked, 48.82ms Time], IncrementalHoareTripleChecker [627 Valid, 4750 Invalid, 4 Unknown, 0 Unchecked, 15417.67ms Time] [2021-11-12 23:44:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-11-12 23:44:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1119. [2021-11-12 23:44:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 846 states have (on average 1.5803782505910164) internal successors, (1337), 883 states have internal predecessors, (1337), 212 states have call successors, (212), 55 states have call predecessors, (212), 60 states have return successors, (237), 211 states have call predecessors, (237), 210 states have call successors, (237) [2021-11-12 23:44:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1786 transitions. [2021-11-12 23:44:31,533 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1786 transitions. Word has length 125 [2021-11-12 23:44:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:31,533 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1786 transitions. [2021-11-12 23:44:31,534 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 23:44:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1786 transitions. [2021-11-12 23:44:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:44:31,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:31,546 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 23:44:31,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:31,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:31,762 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash 100444330, now seen corresponding path program 1 times [2021-11-12 23:44:31,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:31,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693084205] [2021-11-12 23:44:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:31,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:31,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:31,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:31,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:44:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:44:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:32,611 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 23:44:32,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:33,207 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 23:44:33,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:33,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693084205] [2021-11-12 23:44:33,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693084205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:33,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:33,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:44:33,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024313011] [2021-11-12 23:44:33,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:33,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:44:33,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:44:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:33,210 INFO L87 Difference]: Start difference. First operand 1119 states and 1786 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 23:44:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:33,549 INFO L93 Difference]: Finished difference Result 2165 states and 3479 transitions. [2021-11-12 23:44:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:44:33,551 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 23:44:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:33,564 INFO L225 Difference]: With dead ends: 2165 [2021-11-12 23:44:33,565 INFO L226 Difference]: Without dead ends: 1079 [2021-11-12 23:44:33,573 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 23:44:33,574 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 80 mSDsluCounter, 4687 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 5475 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.76ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 5475 Invalid, 147 Unknown, 0 Unchecked, 8.76ms Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 209.47ms Time] [2021-11-12 23:44:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-11-12 23:44:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1076. [2021-11-12 23:44:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 814 states have (on average 1.5872235872235871) internal successors, (1292), 850 states have internal predecessors, (1292), 206 states have call successors, (206), 52 states have call predecessors, (206), 55 states have return successors, (224), 204 states have call predecessors, (224), 204 states have call successors, (224) [2021-11-12 23:44:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1722 transitions. [2021-11-12 23:44:33,664 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1722 transitions. Word has length 128 [2021-11-12 23:44:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:33,665 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1722 transitions. [2021-11-12 23:44:33,665 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 23:44:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1722 transitions. [2021-11-12 23:44:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:44:33,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:33,671 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 23:44:33,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:33,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:33,900 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2085728753, now seen corresponding path program 1 times [2021-11-12 23:44:33,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:33,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344908363] [2021-11-12 23:44:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:33,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:33,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:33,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:44:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:44:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:34,862 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 23:44:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:35,621 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 23:44:35,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:35,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344908363] [2021-11-12 23:44:35,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344908363] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:35,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:35,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-12 23:44:35,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483642403] [2021-11-12 23:44:35,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:44:35,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:44:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:44:35,628 INFO L87 Difference]: Start difference. First operand 1076 states and 1722 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 23:44:37,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:39,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:41,675 WARN L515 Checker$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 23:44:43,680 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 23:44:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:48,325 INFO L93 Difference]: Finished difference Result 2693 states and 4361 transitions. [2021-11-12 23:44:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:44:48,326 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 23:44:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:48,344 INFO L225 Difference]: With dead ends: 2693 [2021-11-12 23:44:48,345 INFO L226 Difference]: Without dead ends: 1657 [2021-11-12 23:44:48,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:44:48,355 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1918 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 496 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11829.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.23ms SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12466.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:48,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 1875 Invalid, 3122 Unknown, 0 Unchecked, 21.23ms Time], IncrementalHoareTripleChecker [496 Valid, 2622 Invalid, 4 Unknown, 0 Unchecked, 12466.90ms Time] [2021-11-12 23:44:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-11-12 23:44:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1616. [2021-11-12 23:44:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1212 states have (on average 1.5907590759075907) internal successors, (1928), 1269 states have internal predecessors, (1928), 319 states have call successors, (319), 75 states have call predecessors, (319), 84 states have return successors, (362), 320 states have call predecessors, (362), 316 states have call successors, (362) [2021-11-12 23:44:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2609 transitions. [2021-11-12 23:44:48,519 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2609 transitions. Word has length 131 [2021-11-12 23:44:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:48,520 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2609 transitions. [2021-11-12 23:44:48,521 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 23:44:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2609 transitions. [2021-11-12 23:44:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:44:48,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:48,526 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 23:44:48,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:48,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:48,742 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1266728470, now seen corresponding path program 1 times [2021-11-12 23:44:48,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:48,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617949954] [2021-11-12 23:44:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:48,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:48,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:48,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:44:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:49,595 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 23:44:49,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:50,026 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 23:44:50,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:50,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617949954] [2021-11-12 23:44:50,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617949954] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:50,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:50,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 23:44:50,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177714230] [2021-11-12 23:44:50,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:50,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:50,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:44:50,028 INFO L87 Difference]: Start difference. First operand 1616 states and 2609 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 23:44:52,052 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 23:44:54,059 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 23:44:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:55,425 INFO L93 Difference]: Finished difference Result 4626 states and 7536 transitions. [2021-11-12 23:44:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:55,427 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 23:44:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:55,459 INFO L225 Difference]: With dead ends: 4626 [2021-11-12 23:44:55,460 INFO L226 Difference]: Without dead ends: 3050 [2021-11-12 23:44:55,476 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 23:44:55,477 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 645 mSDsluCounter, 2207 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4997.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 3150 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.28ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5165.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:55,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 3150 Invalid, 637 Unknown, 0 Unchecked, 9.28ms Time], IncrementalHoareTripleChecker [23 Valid, 612 Invalid, 2 Unknown, 0 Unchecked, 5165.44ms Time] [2021-11-12 23:44:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-11-12 23:44:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 3035. [2021-11-12 23:44:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2258 states have (on average 1.5686448184233834) internal successors, (3542), 2368 states have internal predecessors, (3542), 616 states have call successors, (616), 150 states have call predecessors, (616), 160 states have return successors, (695), 611 states have call predecessors, (695), 610 states have call successors, (695) [2021-11-12 23:44:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4853 transitions. [2021-11-12 23:44:55,783 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 4853 transitions. Word has length 132 [2021-11-12 23:44:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:55,786 INFO L470 AbstractCegarLoop]: Abstraction has 3035 states and 4853 transitions. [2021-11-12 23:44:55,786 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 23:44:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 4853 transitions. [2021-11-12 23:44:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:44:55,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:55,795 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 23:44:55,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 23:44:56,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:56,010 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:56,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash 415828017, now seen corresponding path program 1 times [2021-11-12 23:44:56,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:56,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98776087] [2021-11-12 23:44:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:56,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:56,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:56,013 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:56,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:44:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:44:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:56,921 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 23:44:56,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:57,279 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 23:44:57,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98776087] [2021-11-12 23:44:57,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98776087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:57,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:57,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-12 23:44:57,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507104653] [2021-11-12 23:44:57,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:57,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:44:57,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:44:57,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:44:57,282 INFO L87 Difference]: Start difference. First operand 3035 states and 4853 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 23:44:59,313 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 23:45:01,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:03,326 WARN L515 Checker$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 23:45:05,333 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 23:45:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:07,975 INFO L93 Difference]: Finished difference Result 8964 states and 14514 transitions. [2021-11-12 23:45:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:07,977 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 23:45:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:08,108 INFO L225 Difference]: With dead ends: 8964 [2021-11-12 23:45:08,126 INFO L226 Difference]: Without dead ends: 5969 [2021-11-12 23:45:08,177 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 23:45:08,220 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 2087 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 194 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9985.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 5151 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.92ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10297.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:08,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 5151 Invalid, 1382 Unknown, 0 Unchecked, 14.92ms Time], IncrementalHoareTripleChecker [194 Valid, 1184 Invalid, 4 Unknown, 0 Unchecked, 10297.09ms Time] [2021-11-12 23:45:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-11-12 23:45:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 5943. [2021-11-12 23:45:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5943 states, 4422 states have (on average 1.5639981908638625) internal successors, (6916), 4641 states have internal predecessors, (6916), 1203 states have call successors, (1203), 297 states have call predecessors, (1203), 317 states have return successors, (1466), 1194 states have call predecessors, (1466), 1191 states have call successors, (1466) [2021-11-12 23:45:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 9585 transitions. [2021-11-12 23:45:08,871 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 9585 transitions. Word has length 134 [2021-11-12 23:45:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:08,872 INFO L470 AbstractCegarLoop]: Abstraction has 5943 states and 9585 transitions. [2021-11-12 23:45:08,873 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 23:45:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 9585 transitions. [2021-11-12 23:45:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:45:08,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:08,879 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 23:45:08,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:09,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:09,102 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2097639344, now seen corresponding path program 1 times [2021-11-12 23:45:09,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:09,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260767558] [2021-11-12 23:45:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:09,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:09,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:09,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:45:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:09,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:45:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:10,040 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 23:45:10,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:10,641 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 23:45:10,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:10,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260767558] [2021-11-12 23:45:10,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260767558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:10,642 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:10,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-12 23:45:10,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873665372] [2021-11-12 23:45:10,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:45:10,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:45:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:45:10,644 INFO L87 Difference]: Start difference. First operand 5943 states and 9585 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 23:45:12,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:14,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:16,732 WARN L515 Checker$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 23:45:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:18,943 INFO L93 Difference]: Finished difference Result 13657 states and 22157 transitions. [2021-11-12 23:45:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:45:18,944 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 23:45:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:19,039 INFO L225 Difference]: With dead ends: 13657 [2021-11-12 23:45:19,040 INFO L226 Difference]: Without dead ends: 9884 [2021-11-12 23:45:19,094 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 23:45:19,095 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 1606 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 93 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7418.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.63ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7620.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:19,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 3340 Invalid, 836 Unknown, 0 Unchecked, 10.63ms Time], IncrementalHoareTripleChecker [93 Valid, 740 Invalid, 3 Unknown, 0 Unchecked, 7620.10ms Time] [2021-11-12 23:45:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2021-11-12 23:45:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 9624. [2021-11-12 23:45:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9624 states, 7210 states have (on average 1.5564493758668516) internal successors, (11222), 7553 states have internal predecessors, (11222), 1862 states have call successors, (1862), 489 states have call predecessors, (1862), 551 states have return successors, (2369), 1869 states have call predecessors, (2369), 1844 states have call successors, (2369) [2021-11-12 23:45:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9624 states to 9624 states and 15453 transitions. [2021-11-12 23:45:20,110 INFO L78 Accepts]: Start accepts. Automaton has 9624 states and 15453 transitions. Word has length 134 [2021-11-12 23:45:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:20,111 INFO L470 AbstractCegarLoop]: Abstraction has 9624 states and 15453 transitions. [2021-11-12 23:45:20,111 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 23:45:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9624 states and 15453 transitions. [2021-11-12 23:45:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:45:20,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:20,117 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 23:45:20,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:20,339 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1191343442, now seen corresponding path program 1 times [2021-11-12 23:45:20,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:20,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869214232] [2021-11-12 23:45:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:20,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:20,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:20,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:45:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:20,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:45:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:21,510 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 23:45:21,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:22,316 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 23:45:22,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:22,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869214232] [2021-11-12 23:45:22,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869214232] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:22,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:22,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-12 23:45:22,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575300775] [2021-11-12 23:45:22,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:22,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:45:22,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:45:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:22,319 INFO L87 Difference]: Start difference. First operand 9624 states and 15453 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 23:45:24,346 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:26,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:28,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:30,364 WARN L515 Checker$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 23:45:32,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:34,376 WARN L515 Checker$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 23:45:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:40,209 INFO L93 Difference]: Finished difference Result 16994 states and 27296 transitions. [2021-11-12 23:45:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:45:40,210 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 23:45:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:40,281 INFO L225 Difference]: With dead ends: 16994 [2021-11-12 23:45:40,282 INFO L226 Difference]: Without dead ends: 9734 [2021-11-12 23:45:40,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:45:40,315 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1837 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 471 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16476.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1941 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.15ms SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17223.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:40,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1941 Valid, 2508 Invalid, 4336 Unknown, 0 Unchecked, 21.15ms Time], IncrementalHoareTripleChecker [471 Valid, 3859 Invalid, 6 Unknown, 0 Unchecked, 17223.86ms Time] [2021-11-12 23:45:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9734 states. [2021-11-12 23:45:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9734 to 9580. [2021-11-12 23:45:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9580 states, 7186 states have (on average 1.5560812691344281) internal successors, (11182), 7529 states have internal predecessors, (11182), 1846 states have call successors, (1846), 485 states have call predecessors, (1846), 547 states have return successors, (2353), 1853 states have call predecessors, (2353), 1828 states have call successors, (2353) [2021-11-12 23:45:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9580 states to 9580 states and 15381 transitions. [2021-11-12 23:45:41,352 INFO L78 Accepts]: Start accepts. Automaton has 9580 states and 15381 transitions. Word has length 136 [2021-11-12 23:45:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:41,352 INFO L470 AbstractCegarLoop]: Abstraction has 9580 states and 15381 transitions. [2021-11-12 23:45:41,353 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 23:45:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9580 states and 15381 transitions. [2021-11-12 23:45:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:45:41,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:41,360 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 23:45:41,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:41,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:41,575 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 957900714, now seen corresponding path program 1 times [2021-11-12 23:45:41,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:41,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653481504] [2021-11-12 23:45:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:41,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:41,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:41,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:45:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:45:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:42,578 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 23:45:42,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:43,235 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 23:45:43,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:43,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653481504] [2021-11-12 23:45:43,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653481504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:43,236 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:43,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-12 23:45:43,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956833560] [2021-11-12 23:45:43,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:43,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:45:43,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:43,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:45:43,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:43,239 INFO L87 Difference]: Start difference. First operand 9580 states and 15381 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 23:45:45,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:47,281 WARN L515 Checker$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 23:45:49,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:51,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:55,334 INFO L93 Difference]: Finished difference Result 24160 states and 38988 transitions. [2021-11-12 23:45:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:45:55,335 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 23:45:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:55,518 INFO L225 Difference]: With dead ends: 24160 [2021-11-12 23:45:55,518 INFO L226 Difference]: Without dead ends: 16774 [2021-11-12 23:45:55,555 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 23:45:55,556 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 2073 mSDsluCounter, 4008 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 175 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10660.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.06ms SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11059.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:55,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2083 Valid, 5131 Invalid, 2002 Unknown, 0 Unchecked, 16.06ms Time], IncrementalHoareTripleChecker [175 Valid, 1823 Invalid, 4 Unknown, 0 Unchecked, 11059.64ms Time] [2021-11-12 23:45:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-11-12 23:45:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 16652. [2021-11-12 23:45:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 12534 states have (on average 1.5377373543960429) internal successors, (19274), 13121 states have internal predecessors, (19274), 3120 states have call successors, (3120), 885 states have call predecessors, (3120), 997 states have return successors, (4179), 3129 states have call predecessors, (4179), 3090 states have call successors, (4179) [2021-11-12 23:45:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 26573 transitions. [2021-11-12 23:45:57,222 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 26573 transitions. Word has length 139 [2021-11-12 23:45:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:57,223 INFO L470 AbstractCegarLoop]: Abstraction has 16652 states and 26573 transitions. [2021-11-12 23:45:57,223 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 23:45:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 26573 transitions. [2021-11-12 23:45:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:45:57,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:57,238 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 23:45:57,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:57,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:57,465 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1120088523, now seen corresponding path program 1 times [2021-11-12 23:45:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:57,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596245364] [2021-11-12 23:45:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:57,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:57,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:57,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:45:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:45:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:58,248 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 23:45:58,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:58,714 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 23:45:58,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:58,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596245364] [2021-11-12 23:45:58,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596245364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:58,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:58,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:45:58,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487824843] [2021-11-12 23:45:58,716 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:58,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:58,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:58,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:58,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:58,718 INFO L87 Difference]: Start difference. First operand 16652 states and 26573 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 23:45:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:59,992 INFO L93 Difference]: Finished difference Result 32548 states and 52358 transitions. [2021-11-12 23:45:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:59,993 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 23:45:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:00,104 INFO L225 Difference]: With dead ends: 32548 [2021-11-12 23:46:00,104 INFO L226 Difference]: Without dead ends: 16680 [2021-11-12 23:46:00,184 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 23:46:00,185 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 531 mSDsluCounter, 2845 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 3688 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.10ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:00,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 3688 Invalid, 143 Unknown, 0 Unchecked, 7.10ms Time], IncrementalHoareTripleChecker [49 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 168.86ms Time] [2021-11-12 23:46:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16680 states. [2021-11-12 23:46:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16680 to 16660. [2021-11-12 23:46:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16660 states, 12538 states have (on average 1.5165098101770618) internal successors, (19014), 13129 states have internal predecessors, (19014), 3120 states have call successors, (3120), 885 states have call predecessors, (3120), 1001 states have return successors, (4185), 3129 states have call predecessors, (4185), 3090 states have call successors, (4185) [2021-11-12 23:46:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16660 states to 16660 states and 26319 transitions. [2021-11-12 23:46:01,946 INFO L78 Accepts]: Start accepts. Automaton has 16660 states and 26319 transitions. Word has length 146 [2021-11-12 23:46:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:01,947 INFO L470 AbstractCegarLoop]: Abstraction has 16660 states and 26319 transitions. [2021-11-12 23:46:01,947 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 23:46:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 16660 states and 26319 transitions. [2021-11-12 23:46:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:46:01,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:01,954 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 23:46:01,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:02,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:02,170 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1003730083, now seen corresponding path program 1 times [2021-11-12 23:46:02,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:02,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457206736] [2021-11-12 23:46:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:02,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:02,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:02,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:02,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:46:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:02,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:46:02,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:03,355 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 23:46:03,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:03,769 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 23:46:03,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:03,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457206736] [2021-11-12 23:46:03,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457206736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:03,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:03,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 23:46:03,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615987487] [2021-11-12 23:46:03,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:03,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:46:03,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:46:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:46:03,772 INFO L87 Difference]: Start difference. First operand 16660 states and 26319 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 23:46:05,807 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 23:46:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:07,449 INFO L93 Difference]: Finished difference Result 30870 states and 49312 transitions. [2021-11-12 23:46:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:46:07,451 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 23:46:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:07,714 INFO L225 Difference]: With dead ends: 30870 [2021-11-12 23:46:07,714 INFO L226 Difference]: Without dead ends: 16932 [2021-11-12 23:46:07,775 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 23:46:07,776 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 788 mSDsluCounter, 3384 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2594.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 4414 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.27ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2692.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:07,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 4414 Invalid, 304 Unknown, 0 Unchecked, 8.27ms Time], IncrementalHoareTripleChecker [39 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2692.55ms Time] [2021-11-12 23:46:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16932 states. [2021-11-12 23:46:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16932 to 16810. [2021-11-12 23:46:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16810 states, 12622 states have (on average 1.5130724132467122) internal successors, (19098), 13255 states have internal predecessors, (19098), 3168 states have call successors, (3168), 909 states have call predecessors, (3168), 1019 states have return successors, (4353), 3129 states have call predecessors, (4353), 3138 states have call successors, (4353) [2021-11-12 23:46:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 26619 transitions. [2021-11-12 23:46:09,252 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 26619 transitions. Word has length 151 [2021-11-12 23:46:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:09,253 INFO L470 AbstractCegarLoop]: Abstraction has 16810 states and 26619 transitions. [2021-11-12 23:46:09,253 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 23:46:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 26619 transitions. [2021-11-12 23:46:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:46:09,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:09,260 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 23:46:09,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:09,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:09,474 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1353891293, now seen corresponding path program 1 times [2021-11-12 23:46:09,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:09,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578590818] [2021-11-12 23:46:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:09,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:09,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:09,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:46:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:46:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:10,780 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 23:46:10,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:11,681 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 23:46:11,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:11,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578590818] [2021-11-12 23:46:11,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578590818] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:11,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:11,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:46:11,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011477171] [2021-11-12 23:46:11,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:11,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:46:11,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:11,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:46:11,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:46:11,685 INFO L87 Difference]: Start difference. First operand 16810 states and 26619 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 23:46:13,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:19,094 INFO L93 Difference]: Finished difference Result 34149 states and 54630 transitions. [2021-11-12 23:46:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:46:19,096 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 23:46:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:19,213 INFO L225 Difference]: With dead ends: 34149 [2021-11-12 23:46:19,214 INFO L226 Difference]: Without dead ends: 20053 [2021-11-12 23:46:19,283 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 23:46:19,284 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 1413 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 145 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5459.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.18ms SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6005.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:19,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 2568 Invalid, 2741 Unknown, 0 Unchecked, 22.18ms Time], IncrementalHoareTripleChecker [145 Valid, 2595 Invalid, 1 Unknown, 0 Unchecked, 6005.73ms Time] [2021-11-12 23:46:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20053 states. [2021-11-12 23:46:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20053 to 18565. [2021-11-12 23:46:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18565 states, 14016 states have (on average 1.50349600456621) internal successors, (21073), 14671 states have internal predecessors, (21073), 3376 states have call successors, (3376), 1027 states have call predecessors, (3376), 1172 states have return successors, (4691), 3326 states have call predecessors, (4691), 3349 states have call successors, (4691) [2021-11-12 23:46:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18565 states to 18565 states and 29140 transitions. [2021-11-12 23:46:21,129 INFO L78 Accepts]: Start accepts. Automaton has 18565 states and 29140 transitions. Word has length 156 [2021-11-12 23:46:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:21,130 INFO L470 AbstractCegarLoop]: Abstraction has 18565 states and 29140 transitions. [2021-11-12 23:46:21,130 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 23:46:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 18565 states and 29140 transitions. [2021-11-12 23:46:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:46:21,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:21,136 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 23:46:21,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 23:46:21,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:21,358 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2032858913, now seen corresponding path program 1 times [2021-11-12 23:46:21,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:21,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198635336] [2021-11-12 23:46:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:21,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:46:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:46:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:22,483 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 23:46:22,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:23,168 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 23:46:23,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:23,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198635336] [2021-11-12 23:46:23,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198635336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:23,168 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:23,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-12 23:46:23,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901447300] [2021-11-12 23:46:23,169 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:23,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:46:23,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:46:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:46:23,171 INFO L87 Difference]: Start difference. First operand 18565 states and 29140 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 23:46:25,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:27,202 WARN L515 Checker$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 23:46:29,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:31,214 WARN L515 Checker$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 23:46:33,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:35,224 WARN L515 Checker$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 23:46:37,230 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 23:46:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:45,167 INFO L93 Difference]: Finished difference Result 36980 states and 58576 transitions. [2021-11-12 23:46:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:46:45,168 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 23:46:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:45,238 INFO L225 Difference]: With dead ends: 36980 [2021-11-12 23:46:45,239 INFO L226 Difference]: Without dead ends: 9603 [2021-11-12 23:46:45,348 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 23:46:45,349 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 2929 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 5122 mSolverCounterSat, 893 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19862.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3032 SdHoareTripleChecker+Valid, 3398 SdHoareTripleChecker+Invalid, 6022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.95ms SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 5122 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20725.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:45,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3032 Valid, 3398 Invalid, 6022 Unknown, 0 Unchecked, 34.95ms Time], IncrementalHoareTripleChecker [893 Valid, 5122 Invalid, 7 Unknown, 0 Unchecked, 20725.16ms Time] [2021-11-12 23:46:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9603 states. [2021-11-12 23:46:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9603 to 9510. [2021-11-12 23:46:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 7365 states have (on average 1.513102511880516) internal successors, (11144), 7663 states have internal predecessors, (11144), 1527 states have call successors, (1527), 572 states have call predecessors, (1527), 617 states have return successors, (2025), 1476 states have call predecessors, (2025), 1518 states have call successors, (2025) [2021-11-12 23:46:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 14696 transitions. [2021-11-12 23:46:46,230 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 14696 transitions. Word has length 156 [2021-11-12 23:46:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:46,231 INFO L470 AbstractCegarLoop]: Abstraction has 9510 states and 14696 transitions. [2021-11-12 23:46:46,232 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 23:46:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 14696 transitions. [2021-11-12 23:46:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-12 23:46:46,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:46,444 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 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] [2021-11-12 23:46:46,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:46,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:46,659 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1042806881, now seen corresponding path program 1 times [2021-11-12 23:46:46,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:46,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157303932] [2021-11-12 23:46:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:46,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:46,662 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:46,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:46:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:46:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2021-11-12 23:46:48,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-11-12 23:46:49,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:49,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157303932] [2021-11-12 23:46:49,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157303932] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:49,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:46:49,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128836503] [2021-11-12 23:46:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:49,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:46:49,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:46:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:46:49,898 INFO L87 Difference]: Start difference. First operand 9510 states and 14696 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 5 states have internal predecessors, (182), 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 23:46:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:50,740 INFO L93 Difference]: Finished difference Result 18858 states and 29625 transitions. [2021-11-12 23:46:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:46:50,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 5 states have internal predecessors, (182), 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 489 [2021-11-12 23:46:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:50,788 INFO L225 Difference]: With dead ends: 18858 [2021-11-12 23:46:50,788 INFO L226 Difference]: Without dead ends: 10168 [2021-11-12 23:46:50,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 972 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 23:46:50,819 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 64 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 168.96ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:50,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 4033 Invalid, 40 Unknown, 0 Unchecked, 168.96ms Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 48.40ms Time] [2021-11-12 23:46:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2021-11-12 23:46:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 9590. [2021-11-12 23:46:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 7429 states have (on average 1.5086821914120339) internal successors, (11208), 7727 states have internal predecessors, (11208), 1527 states have call successors, (1527), 572 states have call predecessors, (1527), 633 states have return successors, (2051), 1492 states have call predecessors, (2051), 1518 states have call successors, (2051) [2021-11-12 23:46:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 14786 transitions. [2021-11-12 23:46:51,935 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 14786 transitions. Word has length 489 [2021-11-12 23:46:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:51,936 INFO L470 AbstractCegarLoop]: Abstraction has 9590 states and 14786 transitions. [2021-11-12 23:46:51,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 5 states have internal predecessors, (182), 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 23:46:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 14786 transitions. [2021-11-12 23:46:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-12 23:46:51,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:51,994 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:52,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:52,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:52,211 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash -999664656, now seen corresponding path program 1 times [2021-11-12 23:46:52,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:52,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950897592] [2021-11-12 23:46:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:52,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:52,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:52,285 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:52,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:46:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:53,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:46:53,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-11-12 23:46:54,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2021-11-12 23:46:55,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:55,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950897592] [2021-11-12 23:46:55,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950897592] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:55,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-12 23:46:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091902993] [2021-11-12 23:46:55,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:46:55,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:46:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:55,897 INFO L87 Difference]: Start difference. First operand 9590 states and 14786 transitions. Second operand has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-12 23:46:57,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:59,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:01,949 WARN L515 Checker$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 23:47:03,954 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 23:47:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:10,842 INFO L93 Difference]: Finished difference Result 27618 states and 43428 transitions. [2021-11-12 23:47:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:47:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 489 [2021-11-12 23:47:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:10,916 INFO L225 Difference]: With dead ends: 27618 [2021-11-12 23:47:10,916 INFO L226 Difference]: Without dead ends: 17884 [2021-11-12 23:47:10,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 969 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 23:47:10,952 INFO L933 BasicCegarLoop]: 1252 mSDtfsCounter, 1874 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 4331 mSolverCounterSat, 497 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12899.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.13ms SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 4331 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13709.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:10,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2037 Valid, 2409 Invalid, 4832 Unknown, 0 Unchecked, 25.13ms Time], IncrementalHoareTripleChecker [497 Valid, 4331 Invalid, 4 Unknown, 0 Unchecked, 13709.60ms Time] [2021-11-12 23:47:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17884 states. [2021-11-12 23:47:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17884 to 17061. [2021-11-12 23:47:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17061 states, 13002 states have (on average 1.5011536686663591) internal successors, (19518), 13579 states have internal predecessors, (19518), 2859 states have call successors, (2859), 1092 states have call predecessors, (2859), 1199 states have return successors, (4074), 2769 states have call predecessors, (4074), 2846 states have call successors, (4074) [2021-11-12 23:47:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17061 states to 17061 states and 26451 transitions. [2021-11-12 23:47:12,165 INFO L78 Accepts]: Start accepts. Automaton has 17061 states and 26451 transitions. Word has length 489 [2021-11-12 23:47:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:12,166 INFO L470 AbstractCegarLoop]: Abstraction has 17061 states and 26451 transitions. [2021-11-12 23:47:12,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-12 23:47:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 17061 states and 26451 transitions. [2021-11-12 23:47:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-12 23:47:12,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:12,224 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:12,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:12,438 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1139550916, now seen corresponding path program 1 times [2021-11-12 23:47:12,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:12,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218938213] [2021-11-12 23:47:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:12,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:12,442 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:12,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:47:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:47:13,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:14,740 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 23:47:14,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:16,481 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 23:47:16,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:16,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218938213] [2021-11-12 23:47:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218938213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:16,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1685002092] [2021-11-12 23:47:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:16,482 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:16,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:16,485 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:16,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:47:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:47:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:18,362 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 23:47:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:19,645 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 23:47:19,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1685002092] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:19,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:19,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-12 23:47:19,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269529844] [2021-11-12 23:47:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:19,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:47:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:47:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:47:19,649 INFO L87 Difference]: Start difference. First operand 17061 states and 26451 transitions. Second operand has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 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 23:47:21,674 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 23:47:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:25,164 INFO L93 Difference]: Finished difference Result 47989 states and 76440 transitions. [2021-11-12 23:47:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:47:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 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 23:47:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:25,360 INFO L225 Difference]: With dead ends: 47989 [2021-11-12 23:47:25,361 INFO L226 Difference]: Without dead ends: 30508 [2021-11-12 23:47:25,485 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 23:47:25,487 INFO L933 BasicCegarLoop]: 1314 mSDtfsCounter, 758 mSDsluCounter, 8271 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3222.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 9585 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.26ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3426.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:25,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 9585 Invalid, 1306 Unknown, 0 Unchecked, 18.26ms Time], IncrementalHoareTripleChecker [117 Valid, 1188 Invalid, 1 Unknown, 0 Unchecked, 3426.10ms Time] [2021-11-12 23:47:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30508 states. [2021-11-12 23:47:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30508 to 29990. [2021-11-12 23:47:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29990 states, 22665 states have (on average 1.5048312375909993) internal successors, (34107), 23742 states have internal predecessors, (34107), 5262 states have call successors, (5262), 1930 states have call predecessors, (5262), 2062 states have return successors, (7559), 5077 states have call predecessors, (7559), 5239 states have call successors, (7559) [2021-11-12 23:47:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29990 states to 29990 states and 46928 transitions. [2021-11-12 23:47:28,236 INFO L78 Accepts]: Start accepts. Automaton has 29990 states and 46928 transitions. Word has length 484 [2021-11-12 23:47:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:28,237 INFO L470 AbstractCegarLoop]: Abstraction has 29990 states and 46928 transitions. [2021-11-12 23:47:28,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 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 23:47:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 29990 states and 46928 transitions. [2021-11-12 23:47:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-12 23:47:28,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:28,284 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 12, 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, 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 23:47:28,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:28,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-12 23:47:28,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:28,688 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash -834963276, now seen corresponding path program 1 times [2021-11-12 23:47:28,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:28,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714587527] [2021-11-12 23:47:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:28,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:28,692 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:28,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:47:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:47:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 744 proven. 12 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2021-11-12 23:47:30,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 71 proven. 105 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-11-12 23:47:32,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:32,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714587527] [2021-11-12 23:47:32,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714587527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:32,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1120104297] [2021-11-12 23:47:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:32,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:32,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:32,530 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:32,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:47:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:47:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 664 proven. 12 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-12 23:47:34,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2021-11-12 23:47:36,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1120104297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:36,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898121913] [2021-11-12 23:47:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:36,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:36,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:36,723 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:36,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-12 23:47:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:47:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 664 proven. 12 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-12 23:47:38,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2021-11-12 23:47:39,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898121913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:39,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:47:39,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-12 23:47:39,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057313020] [2021-11-12 23:47:39,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:39,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-12 23:47:39,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-12 23:47:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:47:39,865 INFO L87 Difference]: Start difference. First operand 29990 states and 46928 transitions. Second operand has 27 states, 26 states have (on average 18.653846153846153) internal successors, (485), 24 states have internal predecessors, (485), 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 23:47:41,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:43,907 WARN L515 Checker$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 23:47:45,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:47,919 WARN L515 Checker$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 23:47:49,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:51,930 WARN L515 Checker$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 23:47:53,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:55,941 WARN L515 Checker$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 23:47:57,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:59,953 WARN L515 Checker$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 23:48:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:39,776 INFO L93 Difference]: Finished difference Result 86412 states and 140924 transitions. [2021-11-12 23:48:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-12 23:48:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 18.653846153846153) internal successors, (485), 24 states have internal predecessors, (485), 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 488 [2021-11-12 23:48:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:40,230 INFO L225 Difference]: With dead ends: 86412 [2021-11-12 23:48:40,231 INFO L226 Difference]: Without dead ends: 56236 [2021-11-12 23:48:40,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3018 GetRequests, 2933 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-12 23:48:40,446 INFO L933 BasicCegarLoop]: 2047 mSDtfsCounter, 10048 mSDsluCounter, 7830 mSDsCounter, 0 mSdLazyCounter, 24771 mSolverCounterSat, 4673 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48546.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10048 SdHoareTripleChecker+Valid, 9877 SdHoareTripleChecker+Invalid, 29454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 133.31ms SdHoareTripleChecker+Time, 4673 IncrementalHoareTripleChecker+Valid, 24771 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52389.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:40,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10048 Valid, 9877 Invalid, 29454 Unknown, 0 Unchecked, 133.31ms Time], IncrementalHoareTripleChecker [4673 Valid, 24771 Invalid, 10 Unknown, 0 Unchecked, 52389.71ms Time] [2021-11-12 23:48:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56236 states. [2021-11-12 23:48:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56236 to 44095. [2021-11-12 23:48:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44095 states, 33032 states have (on average 1.4605836764349722) internal successors, (48246), 34545 states have internal predecessors, (48246), 7682 states have call successors, (7682), 3197 states have call predecessors, (7682), 3380 states have return successors, (11690), 7309 states have call predecessors, (11690), 7658 states have call successors, (11690) [2021-11-12 23:48:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44095 states to 44095 states and 67618 transitions. [2021-11-12 23:48:44,348 INFO L78 Accepts]: Start accepts. Automaton has 44095 states and 67618 transitions. Word has length 488 [2021-11-12 23:48:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:44,349 INFO L470 AbstractCegarLoop]: Abstraction has 44095 states and 67618 transitions. [2021-11-12 23:48:44,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 18.653846153846153) internal successors, (485), 24 states have internal predecessors, (485), 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 23:48:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 44095 states and 67618 transitions. [2021-11-12 23:48:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-12 23:48:44,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:44,386 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 23:48:44,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:44,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:44,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:45,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:48:45,011 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1469133390, now seen corresponding path program 1 times [2021-11-12 23:48:45,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:45,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209768460] [2021-11-12 23:48:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:45,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:45,015 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:45,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:48:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:48:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:47,071 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 23:48:47,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:48,219 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 23:48:48,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:48,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209768460] [2021-11-12 23:48:48,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209768460] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:48:48,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:48:48,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:48:48,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507928094] [2021-11-12 23:48:48,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:48,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:48:48,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:48:48,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:48:48,223 INFO L87 Difference]: Start difference. First operand 44095 states and 67618 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 23:48:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:52,132 INFO L93 Difference]: Finished difference Result 86483 states and 134213 transitions. [2021-11-12 23:48:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:48:52,133 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 23:48:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:52,379 INFO L225 Difference]: With dead ends: 86483 [2021-11-12 23:48:52,379 INFO L226 Difference]: Without dead ends: 45149 [2021-11-12 23:48:52,558 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 23:48:52,559 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 101 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:52,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2160 Invalid, 160 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 158.72ms Time] [2021-11-12 23:48:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45149 states. [2021-11-12 23:48:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45149 to 45149. [2021-11-12 23:48:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45149 states, 34008 states have (on average 1.4571277346506704) internal successors, (49554), 35521 states have internal predecessors, (49554), 7682 states have call successors, (7682), 3275 states have call predecessors, (7682), 3458 states have return successors, (11690), 7309 states have call predecessors, (11690), 7658 states have call successors, (11690) [2021-11-12 23:48:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45149 states to 45149 states and 68926 transitions. [2021-11-12 23:48:56,325 INFO L78 Accepts]: Start accepts. Automaton has 45149 states and 68926 transitions. Word has length 502 [2021-11-12 23:48:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:56,326 INFO L470 AbstractCegarLoop]: Abstraction has 45149 states and 68926 transitions. [2021-11-12 23:48:56,327 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 23:48:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 45149 states and 68926 transitions. [2021-11-12 23:48:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-12 23:48:56,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:56,650 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 23:48:56,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:56,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:56,851 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1856586282, now seen corresponding path program 1 times [2021-11-12 23:48:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:56,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528127480] [2021-11-12 23:48:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:56,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:56,857 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:56,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de872e98-68f4-4c3f-8654-d37e369767d5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:48:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:48:57,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:58,779 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 23:48:58,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:00,048 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 23:49:00,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:00,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528127480] [2021-11-12 23:49:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528127480] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:49:00,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:49:00,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:49:00,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770639894] [2021-11-12 23:49:00,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:49:00,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:00,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:49:00,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:49:00,052 INFO L87 Difference]: Start difference. First operand 45149 states and 68926 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)