./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs --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 a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:04:47,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:04:47,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:04:47,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:04:47,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:04:47,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:04:47,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:04:47,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:04:47,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:04:47,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:04:47,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:04:47,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:04:47,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:04:47,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:04:47,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:04:47,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:04:47,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:04:47,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:04:47,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:04:47,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:04:47,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:04:47,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:04:47,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:04:47,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:04:47,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:04:47,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:04:47,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:04:47,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:04:47,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:04:47,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:04:47,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:04:47,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:04:47,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:04:47,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:04:47,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:04:47,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:04:47,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:04:47,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:04:47,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:04:47,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:04:47,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:04:47,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:04:47,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:04:47,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:04:47,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:04:47,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:04:47,328 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:04:47,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:04:47,328 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:04:47,328 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:04:47,328 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:04:47,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:04:47,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:04:47,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:04:47,331 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:04:47,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:04:47,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:04:47,331 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:04:47,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:04:47,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:04:47,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:04:47,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:04:47,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:04:47,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:04:47,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:04:47,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:04:47,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:04:47,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:04:47,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:04:47,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:04:47,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:04:47,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:04:47,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:04:47,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:04:47,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:04:47,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:04:47,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:04:47,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:04:47,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:04:47,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:04:47,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:04:47,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:04:47,339 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2021-11-19 15:04:47,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:04:47,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:04:47,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:04:47,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:04:47,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:04:47,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-19 15:04:47,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/267d5d08c/48653db225634083b4e58ebb6496ac5b/FLAG53d3a6c4c [2021-11-19 15:04:48,375 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:04:48,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-19 15:04:48,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/267d5d08c/48653db225634083b4e58ebb6496ac5b/FLAG53d3a6c4c [2021-11-19 15:04:48,595 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/267d5d08c/48653db225634083b4e58ebb6496ac5b [2021-11-19 15:04:48,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:04:48,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:04:48,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:04:48,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:04:48,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:04:48,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:04:48" (1/1) ... [2021-11-19 15:04:48,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c95519e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:48, skipping insertion in model container [2021-11-19 15:04:48,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:04:48" (1/1) ... [2021-11-19 15:04:48,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:04:48,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:04:48,960 WARN L230 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-19 15:04:49,380 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:04:49,396 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) [2021-11-19 15:04:49,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6443d8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:49, skipping insertion in model container [2021-11-19 15:04:49,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:04:49,397 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:04:49,400 INFO L158 Benchmark]: Toolchain (without parser) took 799.00ms. Allocated memory is still 100.7MB. Free memory was 57.8MB in the beginning and 64.0MB in the end (delta: -6.2MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-19 15:04:49,401 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 76.6MB in the beginning and 76.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:04:49,403 INFO L158 Benchmark]: CACSL2BoogieTranslator took 796.32ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 64.0MB in the end (delta: -6.5MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-19 15:04:49,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 76.6MB in the beginning and 76.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 796.32ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 64.0MB in the end (delta: -6.5MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs --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 a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:04:51,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:04:51,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:04:51,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:04:51,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:04:51,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:04:51,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:04:51,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:04:51,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:04:51,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:04:51,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:04:51,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:04:51,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:04:51,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:04:51,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:04:51,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:04:51,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:04:51,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:04:51,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:04:51,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:04:51,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:04:51,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:04:51,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:04:51,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:04:51,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:04:51,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:04:51,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:04:51,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:04:51,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:04:51,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:04:51,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:04:51,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:04:51,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:04:51,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:04:51,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:04:51,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:04:51,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:04:51,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:04:51,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:04:51,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:04:51,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:04:51,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:04:51,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:04:51,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:04:51,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:04:51,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:04:51,776 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:04:51,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:04:51,776 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:04:51,777 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:04:51,777 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:04:51,777 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:04:51,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:04:51,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:04:51,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:04:51,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:04:51,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:04:51,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:04:51,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:04:51,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:04:51,781 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:04:51,782 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:04:51,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:04:51,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:04:51,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:04:51,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:04:51,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:04:51,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:04:51,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:04:51,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:04:51,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:04:51,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:04:51,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:04:51,784 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:04:51,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:51,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:04:51,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:04:51,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:04:51,786 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2021-11-19 15:04:52,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:04:52,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:04:52,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:04:52,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:04:52,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:04:52,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-19 15:04:52,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/36a561a12/f607087bf9b14438a2f0c3178216a1c7/FLAGe7a99525f [2021-11-19 15:04:53,081 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:04:53,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-19 15:04:53,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/36a561a12/f607087bf9b14438a2f0c3178216a1c7/FLAGe7a99525f [2021-11-19 15:04:53,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/data/36a561a12/f607087bf9b14438a2f0c3178216a1c7 [2021-11-19 15:04:53,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:04:53,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:04:53,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:04:53,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:04:53,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:04:53,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:04:53" (1/1) ... [2021-11-19 15:04:53,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20abcfd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:53, skipping insertion in model container [2021-11-19 15:04:53,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:04:53" (1/1) ... [2021-11-19 15:04:53,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:04:53,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:04:53,544 WARN L230 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-19 15:04:53,862 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:04:53,884 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:04:53,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:04:53,919 WARN L230 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-19 15:04:54,086 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:04:54,092 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:04:54,108 WARN L230 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_8abd74f2-44ad-4f87-8593-aee7879eb78c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-19 15:04:54,185 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:04:54,223 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:04:54,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54 WrapperNode [2021-11-19 15:04:54,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:04:54,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:04:54,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:04:54,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:04:54,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,364 INFO L137 Inliner]: procedures = 92, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1004 [2021-11-19 15:04:54,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:04:54,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:04:54,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:04:54,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:04:54,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:04:54,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:04:54,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:04:54,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:04:54,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (1/1) ... [2021-11-19 15:04:54,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:04:54,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:04:54,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:04:54,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:04:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:04:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:04:54,571 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:04:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:04:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:04:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 15:04:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 15:04:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:04:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:04:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 15:04:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 15:04:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:04:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:04:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:04:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:04:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:04:54,574 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:04:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:04:54,574 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:04:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:04:54,574 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:04:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:04:54,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:04:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:04:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 15:04:54,575 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 15:04:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:04:54,576 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:04:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 15:04:54,576 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 15:04:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:04:54,576 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:04:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:04:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:04:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:04:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:04:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:04:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:04:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:04:54,578 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:04:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:04:54,578 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:04:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:04:54,578 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:04:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:04:54,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:04:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:04:54,579 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:04:54,734 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:04:54,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:04:55,837 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:04:55,852 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:04:55,853 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:04:55,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:04:55 BoogieIcfgContainer [2021-11-19 15:04:55,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:04:55,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:04:55,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:04:55,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:04:55,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:04:53" (1/3) ... [2021-11-19 15:04:55,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7ae860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:04:55, skipping insertion in model container [2021-11-19 15:04:55,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:04:54" (2/3) ... [2021-11-19 15:04:55,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7ae860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:04:55, skipping insertion in model container [2021-11-19 15:04:55,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:04:55" (3/3) ... [2021-11-19 15:04:55,864 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2021-11-19 15:04:55,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:04:55,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:04:55,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:04:55,949 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 [2021-11-19 15:04:55,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:04:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 526 states, 411 states have (on average 1.683698296836983) internal successors, (692), 427 states have internal predecessors, (692), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:04:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 15:04:56,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:56,019 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] [2021-11-19 15:04:56,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash -63846354, now seen corresponding path program 1 times [2021-11-19 15:04:56,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:56,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841720646] [2021-11-19 15:04:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:56,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:56,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:56,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:04:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:04:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:04:56,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:04:57,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:57,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841720646] [2021-11-19 15:04:57,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841720646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:57,162 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:57,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:04:57,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419279640] [2021-11-19 15:04:57,165 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:57,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:04:57,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:04:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:04:57,203 INFO L87 Difference]: Start difference. First operand has 526 states, 411 states have (on average 1.683698296836983) internal successors, (692), 427 states have internal predecessors, (692), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 15:04:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:57,536 INFO L93 Difference]: Finished difference Result 1047 states and 1750 transitions. [2021-11-19 15:04:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:04:57,539 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 [2021-11-19 15:04:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:57,565 INFO L225 Difference]: With dead ends: 1047 [2021-11-19 15:04:57,569 INFO L226 Difference]: Without dead ends: 521 [2021-11-19 15:04:57,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:04:57,594 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 31 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:57,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1710 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:04:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-19 15:04:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2021-11-19 15:04:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.660933660933661) internal successors, (676), 422 states have internal predecessors, (676), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:04:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 857 transitions. [2021-11-19 15:04:57,740 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 857 transitions. Word has length 101 [2021-11-19 15:04:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:57,741 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 857 transitions. [2021-11-19 15:04:57,741 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) [2021-11-19 15:04:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 857 transitions. [2021-11-19 15:04:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 15:04:57,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:57,759 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] [2021-11-19 15:04:57,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 15:04:57,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:57,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash -165243139, now seen corresponding path program 1 times [2021-11-19 15:04:57,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:57,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070623529] [2021-11-19 15:04:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:57,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:57,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:58,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:04:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:04:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:04:58,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:04:59,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:59,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070623529] [2021-11-19 15:04:59,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070623529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:59,002 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:04:59,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563429349] [2021-11-19 15:04:59,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:59,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:04:59,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:59,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:04:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:04:59,014 INFO L87 Difference]: Start difference. First operand 521 states and 857 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) [2021-11-19 15:04:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:59,303 INFO L93 Difference]: Finished difference Result 1030 states and 1706 transitions. [2021-11-19 15:04:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:04:59,304 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 [2021-11-19 15:04:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:59,310 INFO L225 Difference]: With dead ends: 1030 [2021-11-19 15:04:59,311 INFO L226 Difference]: Without dead ends: 530 [2021-11-19 15:04:59,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:04:59,317 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 118 mSDsluCounter, 5715 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:59,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6556 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:04:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-19 15:04:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2021-11-19 15:04:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 415 states have (on average 1.6602409638554216) internal successors, (689), 431 states have internal predecessors, (689), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-19 15:04:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 871 transitions. [2021-11-19 15:04:59,376 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 871 transitions. Word has length 106 [2021-11-19 15:04:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:59,377 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 871 transitions. [2021-11-19 15:04:59,378 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) [2021-11-19 15:04:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 871 transitions. [2021-11-19 15:04:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 15:04:59,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:59,386 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] [2021-11-19 15:04:59,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:59,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:59,607 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1036237632, now seen corresponding path program 1 times [2021-11-19 15:04:59,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:59,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975020620] [2021-11-19 15:04:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:59,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:59,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:59,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:59,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:04:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:59,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:04:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:05:00,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:05:00,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:00,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975020620] [2021-11-19 15:05:00,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975020620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:00,551 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:00,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:05:00,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142545180] [2021-11-19 15:05:00,552 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:00,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:05:00,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:00,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:05:00,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:05:00,557 INFO L87 Difference]: Start difference. First operand 530 states and 871 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) [2021-11-19 15:05:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:00,828 INFO L93 Difference]: Finished difference Result 1086 states and 1797 transitions. [2021-11-19 15:05:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:05:00,829 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 [2021-11-19 15:05:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:00,836 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 15:05:00,837 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 15:05:00,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:05:00,844 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 136 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:00,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 3146 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:05:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 15:05:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 535. [2021-11-19 15:05:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 420 states have (on average 1.6) internal successors, (672), 435 states have internal predecessors, (672), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:05:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 853 transitions. [2021-11-19 15:05:00,886 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 853 transitions. Word has length 107 [2021-11-19 15:05:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:00,887 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 853 transitions. [2021-11-19 15:05:00,887 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) [2021-11-19 15:05:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 853 transitions. [2021-11-19 15:05:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 15:05:00,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:00,898 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] [2021-11-19 15:05:00,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:01,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:01,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1866993797, now seen corresponding path program 1 times [2021-11-19 15:05:01,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:01,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315326066] [2021-11-19 15:05:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:01,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:01,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:01,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:01,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:05:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:01,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:05:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:05:01,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:05:02,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:02,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315326066] [2021-11-19 15:05:02,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315326066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:02,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:02,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:05:02,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572315934] [2021-11-19 15:05:02,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:02,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:05:02,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:05:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:05:02,063 INFO L87 Difference]: Start difference. First operand 535 states and 853 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) [2021-11-19 15:05:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:02,219 INFO L93 Difference]: Finished difference Result 1028 states and 1660 transitions. [2021-11-19 15:05:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:05:02,221 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 [2021-11-19 15:05:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:02,227 INFO L225 Difference]: With dead ends: 1028 [2021-11-19 15:05:02,228 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 15:05:02,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:02,245 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 137 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4067 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:02,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4067 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:05:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 15:05:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 514. [2021-11-19 15:05:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6140350877192982) internal successors, (644), 414 states have internal predecessors, (644), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:05:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 825 transitions. [2021-11-19 15:05:02,279 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 825 transitions. Word has length 109 [2021-11-19 15:05:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:02,280 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 825 transitions. [2021-11-19 15:05:02,280 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) [2021-11-19 15:05:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 825 transitions. [2021-11-19 15:05:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 15:05:02,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:02,285 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] [2021-11-19 15:05:02,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:02,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:02,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash -825523254, now seen corresponding path program 1 times [2021-11-19 15:05:02,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:02,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384514410] [2021-11-19 15:05:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:02,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:02,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:02,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:05:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:02,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:05:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:05:03,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:05:03,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:03,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384514410] [2021-11-19 15:05:03,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384514410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:03,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:03,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:05:03,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307636931] [2021-11-19 15:05:03,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:03,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:05:03,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:05:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:05:03,562 INFO L87 Difference]: Start difference. First operand 514 states and 825 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) [2021-11-19 15:05:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:03,841 INFO L93 Difference]: Finished difference Result 997 states and 1615 transitions. [2021-11-19 15:05:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:05:03,843 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 [2021-11-19 15:05:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:03,851 INFO L225 Difference]: With dead ends: 997 [2021-11-19 15:05:03,851 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 15:05:03,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:05:03,856 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 72 mSDsluCounter, 5437 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6219 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:03,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6219 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:05:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 15:05:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 516. [2021-11-19 15:05:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 401 states have (on average 1.6084788029925188) internal successors, (645), 416 states have internal predecessors, (645), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:05:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 826 transitions. [2021-11-19 15:05:03,889 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 826 transitions. Word has length 112 [2021-11-19 15:05:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:03,891 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 826 transitions. [2021-11-19 15:05:03,892 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) [2021-11-19 15:05:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 826 transitions. [2021-11-19 15:05:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:05:03,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:03,897 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] [2021-11-19 15:05:03,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:04,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:04,106 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1609037407, now seen corresponding path program 1 times [2021-11-19 15:05:04,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:04,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676406673] [2021-11-19 15:05:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:04,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:04,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:04,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:04,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:05:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:05:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:05:04,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:05:05,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:05,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676406673] [2021-11-19 15:05:05,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676406673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:05,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:05,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:05:05,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214344633] [2021-11-19 15:05:05,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:05,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:05:05,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:05:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:05,010 INFO L87 Difference]: Start difference. First operand 516 states and 826 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) [2021-11-19 15:05:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:05,895 INFO L93 Difference]: Finished difference Result 993 states and 1633 transitions. [2021-11-19 15:05:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:05:05,897 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 [2021-11-19 15:05:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:05,901 INFO L225 Difference]: With dead ends: 993 [2021-11-19 15:05:05,902 INFO L226 Difference]: Without dead ends: 520 [2021-11-19 15:05:05,906 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 [2021-11-19 15:05:05,908 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 746 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:05,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1989 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:05:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-19 15:05:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2021-11-19 15:05:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 404 states have (on average 1.603960396039604) internal successors, (648), 419 states have internal predecessors, (648), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-19 15:05:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 830 transitions. [2021-11-19 15:05:05,949 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 830 transitions. Word has length 113 [2021-11-19 15:05:05,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:05,950 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 830 transitions. [2021-11-19 15:05:05,950 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) [2021-11-19 15:05:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 830 transitions. [2021-11-19 15:05:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 15:05:05,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:05,955 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] [2021-11-19 15:05:05,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:06,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:06,172 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash -306671440, now seen corresponding path program 1 times [2021-11-19 15:05:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:06,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521468123] [2021-11-19 15:05:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:06,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:06,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:06,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:05:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:06,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:05:06,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:05:06,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:05:07,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:07,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521468123] [2021-11-19 15:05:07,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521468123] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:07,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:05:07,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80286137] [2021-11-19 15:05:07,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:07,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:05:07,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:07,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:05:07,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:07,120 INFO L87 Difference]: Start difference. First operand 520 states and 830 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) [2021-11-19 15:05:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:07,981 INFO L93 Difference]: Finished difference Result 1002 states and 1640 transitions. [2021-11-19 15:05:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:05:07,982 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 [2021-11-19 15:05:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:07,987 INFO L225 Difference]: With dead ends: 1002 [2021-11-19 15:05:07,987 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 15:05:07,992 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 [2021-11-19 15:05:07,993 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 753 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:07,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 1990 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:05:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 15:05:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 15:05:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.5980392156862746) internal successors, (652), 423 states have internal predecessors, (652), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-19 15:05:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 835 transitions. [2021-11-19 15:05:08,026 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 835 transitions. Word has length 116 [2021-11-19 15:05:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:08,027 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 835 transitions. [2021-11-19 15:05:08,027 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) [2021-11-19 15:05:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 835 transitions. [2021-11-19 15:05:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 15:05:08,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:08,032 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] [2021-11-19 15:05:08,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:08,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:08,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash -869901509, now seen corresponding path program 1 times [2021-11-19 15:05:08,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:08,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300197614] [2021-11-19 15:05:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:08,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:08,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:08,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:05:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:05:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:05:08,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:05:09,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:09,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300197614] [2021-11-19 15:05:09,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300197614] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:09,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:09,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:05:09,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119324409] [2021-11-19 15:05:09,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:09,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:05:09,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:09,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:05:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:09,180 INFO L87 Difference]: Start difference. First operand 525 states and 835 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) [2021-11-19 15:05:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:10,022 INFO L93 Difference]: Finished difference Result 1013 states and 1649 transitions. [2021-11-19 15:05:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:05:10,022 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 [2021-11-19 15:05:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:10,040 INFO L225 Difference]: With dead ends: 1013 [2021-11-19 15:05:10,042 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 15:05:10,047 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 [2021-11-19 15:05:10,049 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 747 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:10,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1990 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:05:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 15:05:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 15:05:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 413 states have (on average 1.5907990314769975) internal successors, (657), 428 states have internal predecessors, (657), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (93), 88 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-19 15:05:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 841 transitions. [2021-11-19 15:05:10,078 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 841 transitions. Word has length 119 [2021-11-19 15:05:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:10,078 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 841 transitions. [2021-11-19 15:05:10,078 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) [2021-11-19 15:05:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 841 transitions. [2021-11-19 15:05:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 15:05:10,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:10,083 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] [2021-11-19 15:05:10,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:10,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:10,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1862775100, now seen corresponding path program 1 times [2021-11-19 15:05:10,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:10,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485017713] [2021-11-19 15:05:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:10,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:10,311 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:10,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:05:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:05:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:05:10,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:05:11,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:11,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485017713] [2021-11-19 15:05:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485017713] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:11,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:11,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:05:11,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802961918] [2021-11-19 15:05:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:11,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:05:11,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:05:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:11,247 INFO L87 Difference]: Start difference. First operand 531 states and 841 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) [2021-11-19 15:05:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:12,015 INFO L93 Difference]: Finished difference Result 1026 states and 1660 transitions. [2021-11-19 15:05:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:05:12,015 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 [2021-11-19 15:05:12,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:12,020 INFO L225 Difference]: With dead ends: 1026 [2021-11-19 15:05:12,020 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 15:05:12,023 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 [2021-11-19 15:05:12,024 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 756 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:12,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1990 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:05:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 15:05:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-19 15:05:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.5823389021479715) internal successors, (663), 434 states have internal predecessors, (663), 91 states have call successors, (91), 28 states have call predecessors, (91), 27 states have return successors, (94), 88 states have call predecessors, (94), 90 states have call successors, (94) [2021-11-19 15:05:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 848 transitions. [2021-11-19 15:05:12,087 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 848 transitions. Word has length 122 [2021-11-19 15:05:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:12,087 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 848 transitions. [2021-11-19 15:05:12,088 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) [2021-11-19 15:05:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 848 transitions. [2021-11-19 15:05:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:05:12,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:12,092 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] [2021-11-19 15:05:12,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:12,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:12,311 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:12,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1337259497, now seen corresponding path program 1 times [2021-11-19 15:05:12,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:12,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196000122] [2021-11-19 15:05:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:12,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:12,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:12,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:12,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:05:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:12,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:05:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:05:12,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 15:05:13,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:13,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196000122] [2021-11-19 15:05:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196000122] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:13,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-19 15:05:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538255119] [2021-11-19 15:05:13,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:13,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:05:13,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:05:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:05:13,464 INFO L87 Difference]: Start difference. First operand 538 states and 848 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) [2021-11-19 15:05:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:20,346 INFO L93 Difference]: Finished difference Result 1824 states and 2955 transitions. [2021-11-19 15:05:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:05:20,347 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 [2021-11-19 15:05:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:20,360 INFO L225 Difference]: With dead ends: 1824 [2021-11-19 15:05:20,361 INFO L226 Difference]: Without dead ends: 1329 [2021-11-19 15:05:20,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:05:20,365 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 1614 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 6220 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 4978 SdHoareTripleChecker+Invalid, 6837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 6220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:20,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1716 Valid, 4978 Invalid, 6837 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [617 Valid, 6220 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-19 15:05:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-11-19 15:05:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1107. [2021-11-19 15:05:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 840 states have (on average 1.5869047619047618) internal successors, (1333), 877 states have internal predecessors, (1333), 208 states have call successors, (208), 53 states have call predecessors, (208), 58 states have return successors, (233), 207 states have call predecessors, (233), 206 states have call successors, (233) [2021-11-19 15:05:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1774 transitions. [2021-11-19 15:05:20,454 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1774 transitions. Word has length 125 [2021-11-19 15:05:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:20,454 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1774 transitions. [2021-11-19 15:05:20,455 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) [2021-11-19 15:05:20,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1774 transitions. [2021-11-19 15:05:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 15:05:20,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:20,492 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] [2021-11-19 15:05:20,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:20,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:20,693 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1498210996, now seen corresponding path program 1 times [2021-11-19 15:05:20,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:20,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163371718] [2021-11-19 15:05:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:20,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:20,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:20,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:05:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:05:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:05:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:05:21,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:21,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163371718] [2021-11-19 15:05:21,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163371718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:21,551 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:21,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 15:05:21,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628845513] [2021-11-19 15:05:21,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:21,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:05:21,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:21,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:05:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:05:21,553 INFO L87 Difference]: Start difference. First operand 1107 states and 1774 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) [2021-11-19 15:05:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:21,837 INFO L93 Difference]: Finished difference Result 2141 states and 3455 transitions. [2021-11-19 15:05:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:05:21,838 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 [2021-11-19 15:05:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:21,848 INFO L225 Difference]: With dead ends: 2141 [2021-11-19 15:05:21,848 INFO L226 Difference]: Without dead ends: 1067 [2021-11-19 15:05:21,854 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 [2021-11-19 15:05:21,855 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 85 mSDsluCounter, 4665 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 5447 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:21,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 5447 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:05:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-19 15:05:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1064. [2021-11-19 15:05:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 808 states have (on average 1.5940594059405941) internal successors, (1288), 844 states have internal predecessors, (1288), 202 states have call successors, (202), 50 states have call predecessors, (202), 53 states have return successors, (220), 200 states have call predecessors, (220), 200 states have call successors, (220) [2021-11-19 15:05:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1710 transitions. [2021-11-19 15:05:21,915 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1710 transitions. Word has length 128 [2021-11-19 15:05:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:21,916 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1710 transitions. [2021-11-19 15:05:21,916 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) [2021-11-19 15:05:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1710 transitions. [2021-11-19 15:05:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:05:21,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:21,920 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] [2021-11-19 15:05:21,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:22,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:22,135 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -116011409, now seen corresponding path program 1 times [2021-11-19 15:05:22,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:22,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066063613] [2021-11-19 15:05:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:22,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:22,138 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:22,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:05:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:05:22,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:05:22,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:05:23,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:23,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066063613] [2021-11-19 15:05:23,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066063613] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:23,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:23,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-19 15:05:23,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730777990] [2021-11-19 15:05:23,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:23,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:05:23,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:05:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:05:23,329 INFO L87 Difference]: Start difference. First operand 1064 states and 1710 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) [2021-11-19 15:05:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:27,089 INFO L93 Difference]: Finished difference Result 2663 states and 4331 transitions. [2021-11-19 15:05:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:05:27,089 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 [2021-11-19 15:05:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:27,104 INFO L225 Difference]: With dead ends: 2663 [2021-11-19 15:05:27,104 INFO L226 Difference]: Without dead ends: 1639 [2021-11-19 15:05:27,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:05:27,112 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 1911 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:27,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 1871 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 15:05:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-11-19 15:05:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1598. [2021-11-19 15:05:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1203 states have (on average 1.597672485453034) internal successors, (1922), 1260 states have internal predecessors, (1922), 313 states have call successors, (313), 72 states have call predecessors, (313), 81 states have return successors, (356), 314 states have call predecessors, (356), 310 states have call successors, (356) [2021-11-19 15:05:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2591 transitions. [2021-11-19 15:05:27,213 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2591 transitions. Word has length 131 [2021-11-19 15:05:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:27,214 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2591 transitions. [2021-11-19 15:05:27,214 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) [2021-11-19 15:05:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2591 transitions. [2021-11-19 15:05:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 15:05:27,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:27,219 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] [2021-11-19 15:05:27,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:27,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:27,450 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash -823398580, now seen corresponding path program 1 times [2021-11-19 15:05:27,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:27,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574799385] [2021-11-19 15:05:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:27,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:27,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:27,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:27,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:05:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:05:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 15:05:28,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:05:28,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:28,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574799385] [2021-11-19 15:05:28,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574799385] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:28,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:28,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 15:05:28,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934561811] [2021-11-19 15:05:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:28,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:05:28,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:05:28,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:05:28,350 INFO L87 Difference]: Start difference. First operand 1598 states and 2591 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) [2021-11-19 15:05:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:29,380 INFO L93 Difference]: Finished difference Result 4572 states and 7482 transitions. [2021-11-19 15:05:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:05:29,381 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 [2021-11-19 15:05:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:29,406 INFO L225 Difference]: With dead ends: 4572 [2021-11-19 15:05:29,407 INFO L226 Difference]: Without dead ends: 3014 [2021-11-19 15:05:29,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:29,419 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 639 mSDsluCounter, 2193 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:29,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 3128 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:05:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-11-19 15:05:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 2999. [2021-11-19 15:05:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2240 states have (on average 1.5758928571428572) internal successors, (3530), 2350 states have internal predecessors, (3530), 604 states have call successors, (604), 144 states have call predecessors, (604), 154 states have return successors, (683), 599 states have call predecessors, (683), 598 states have call successors, (683) [2021-11-19 15:05:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4817 transitions. [2021-11-19 15:05:29,640 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4817 transitions. Word has length 132 [2021-11-19 15:05:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:29,640 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 4817 transitions. [2021-11-19 15:05:29,640 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) [2021-11-19 15:05:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4817 transitions. [2021-11-19 15:05:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:05:29,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:29,646 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] [2021-11-19 15:05:29,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:29,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:29,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 709127910, now seen corresponding path program 1 times [2021-11-19 15:05:29,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:29,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696811210] [2021-11-19 15:05:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:29,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:29,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:29,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:29,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:05:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:30,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:05:30,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:05:30,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:05:30,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:30,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696811210] [2021-11-19 15:05:30,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696811210] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:30,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:30,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-19 15:05:30,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822464681] [2021-11-19 15:05:30,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:30,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:05:30,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:05:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:05:30,713 INFO L87 Difference]: Start difference. First operand 2999 states and 4817 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) [2021-11-19 15:05:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:32,630 INFO L93 Difference]: Finished difference Result 8856 states and 14442 transitions. [2021-11-19 15:05:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:05:32,631 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 [2021-11-19 15:05:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:32,681 INFO L225 Difference]: With dead ends: 8856 [2021-11-19 15:05:32,681 INFO L226 Difference]: Without dead ends: 5897 [2021-11-19 15:05:32,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:32,708 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 1506 mSDsluCounter, 3569 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 5125 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:32,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 5125 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:05:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2021-11-19 15:05:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 5871. [2021-11-19 15:05:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4386 states have (on average 1.5713634290925673) internal successors, (6892), 4605 states have internal predecessors, (6892), 1179 states have call successors, (1179), 285 states have call predecessors, (1179), 305 states have return successors, (1478), 1170 states have call predecessors, (1478), 1167 states have call successors, (1478) [2021-11-19 15:05:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9549 transitions. [2021-11-19 15:05:33,245 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9549 transitions. Word has length 134 [2021-11-19 15:05:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:33,246 INFO L470 AbstractCegarLoop]: Abstraction has 5871 states and 9549 transitions. [2021-11-19 15:05:33,247 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) [2021-11-19 15:05:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9549 transitions. [2021-11-19 15:05:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:05:33,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:33,252 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] [2021-11-19 15:05:33,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 15:05:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:33,465 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1804339451, now seen corresponding path program 1 times [2021-11-19 15:05:33,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:33,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711165857] [2021-11-19 15:05:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:33,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:05:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:05:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:05:34,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:05:34,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:34,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711165857] [2021-11-19 15:05:34,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711165857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:34,452 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:34,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-19 15:05:34,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589034873] [2021-11-19 15:05:34,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:34,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:05:34,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:34,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:05:34,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:05:34,455 INFO L87 Difference]: Start difference. First operand 5871 states and 9549 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) [2021-11-19 15:05:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:36,122 INFO L93 Difference]: Finished difference Result 13513 states and 22085 transitions. [2021-11-19 15:05:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:05:36,123 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 [2021-11-19 15:05:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:36,207 INFO L225 Difference]: With dead ends: 13513 [2021-11-19 15:05:36,207 INFO L226 Difference]: Without dead ends: 9776 [2021-11-19 15:05:36,276 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 [2021-11-19 15:05:36,277 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 1603 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:36,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 3408 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 15:05:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9776 states. [2021-11-19 15:05:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9776 to 9516. [2021-11-19 15:05:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 7156 states have (on average 1.563163778647289) internal successors, (11186), 7499 states have internal predecessors, (11186), 1826 states have call successors, (1826), 471 states have call predecessors, (1826), 533 states have return successors, (2387), 1833 states have call predecessors, (2387), 1808 states have call successors, (2387) [2021-11-19 15:05:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 15399 transitions. [2021-11-19 15:05:36,973 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 15399 transitions. Word has length 134 [2021-11-19 15:05:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:36,974 INFO L470 AbstractCegarLoop]: Abstraction has 9516 states and 15399 transitions. [2021-11-19 15:05:36,974 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) [2021-11-19 15:05:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 15399 transitions. [2021-11-19 15:05:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 15:05:36,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:36,979 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] [2021-11-19 15:05:36,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:37,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:37,196 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash 997153669, now seen corresponding path program 1 times [2021-11-19 15:05:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084282485] [2021-11-19 15:05:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:37,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:37,199 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:37,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:05:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:05:37,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:05:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:05:38,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084282485] [2021-11-19 15:05:38,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084282485] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:38,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:38,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-19 15:05:38,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172323104] [2021-11-19 15:05:38,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:38,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:05:38,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:05:38,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:05:38,489 INFO L87 Difference]: Start difference. First operand 9516 states and 15399 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) [2021-11-19 15:05:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:43,187 INFO L93 Difference]: Finished difference Result 16814 states and 27206 transitions. [2021-11-19 15:05:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:05:43,188 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 [2021-11-19 15:05:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:43,256 INFO L225 Difference]: With dead ends: 16814 [2021-11-19 15:05:43,257 INFO L226 Difference]: Without dead ends: 9626 [2021-11-19 15:05:43,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:05:43,289 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 1830 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 4015 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 4476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 4015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:43,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1932 Valid, 2586 Invalid, 4476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 4015 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 15:05:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9626 states. [2021-11-19 15:05:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9626 to 9472. [2021-11-19 15:05:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9472 states, 7132 states have (on average 1.562815479528884) internal successors, (11146), 7475 states have internal predecessors, (11146), 1810 states have call successors, (1810), 467 states have call predecessors, (1810), 529 states have return successors, (2371), 1817 states have call predecessors, (2371), 1792 states have call successors, (2371) [2021-11-19 15:05:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 15327 transitions. [2021-11-19 15:05:44,044 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 15327 transitions. Word has length 136 [2021-11-19 15:05:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:44,044 INFO L470 AbstractCegarLoop]: Abstraction has 9472 states and 15327 transitions. [2021-11-19 15:05:44,044 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) [2021-11-19 15:05:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 15327 transitions. [2021-11-19 15:05:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 15:05:44,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:44,049 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] [2021-11-19 15:05:44,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:44,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:44,265 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash -928676863, now seen corresponding path program 1 times [2021-11-19 15:05:44,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:44,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323344426] [2021-11-19 15:05:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:44,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:44,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:44,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:44,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:05:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:05:44,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:05:44,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:05:45,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:45,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323344426] [2021-11-19 15:05:45,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323344426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:45,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:45,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-19 15:05:45,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884449601] [2021-11-19 15:05:45,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:45,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:05:45,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:45,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:05:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:05:45,351 INFO L87 Difference]: Start difference. First operand 9472 states and 15327 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) [2021-11-19 15:05:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:48,927 INFO L93 Difference]: Finished difference Result 23908 states and 38862 transitions. [2021-11-19 15:05:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 15:05:48,928 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 [2021-11-19 15:05:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:49,032 INFO L225 Difference]: With dead ends: 23908 [2021-11-19 15:05:49,032 INFO L226 Difference]: Without dead ends: 16594 [2021-11-19 15:05:49,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:05:49,073 INFO L933 BasicCegarLoop]: 1113 mSDtfsCounter, 2158 mSDsluCounter, 4535 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 5648 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:49,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 5648 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 15:05:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16594 states. [2021-11-19 15:05:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16594 to 16472. [2021-11-19 15:05:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16472 states, 12444 states have (on average 1.544037287045966) internal successors, (19214), 13031 states have internal predecessors, (19214), 3060 states have call successors, (3060), 855 states have call predecessors, (3060), 967 states have return successors, (4209), 3069 states have call predecessors, (4209), 3030 states have call successors, (4209) [2021-11-19 15:05:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16472 states to 16472 states and 26483 transitions. [2021-11-19 15:05:50,425 INFO L78 Accepts]: Start accepts. Automaton has 16472 states and 26483 transitions. Word has length 139 [2021-11-19 15:05:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:50,425 INFO L470 AbstractCegarLoop]: Abstraction has 16472 states and 26483 transitions. [2021-11-19 15:05:50,426 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) [2021-11-19 15:05:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16472 states and 26483 transitions. [2021-11-19 15:05:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 15:05:50,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:50,431 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] [2021-11-19 15:05:50,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:50,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:50,646 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1028593816, now seen corresponding path program 1 times [2021-11-19 15:05:50,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:50,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573612947] [2021-11-19 15:05:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:50,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:50,649 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:50,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:05:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:05:50,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:05:51,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:05:51,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573612947] [2021-11-19 15:05:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573612947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:51,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:51,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:05:51,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841640554] [2021-11-19 15:05:51,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:51,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:05:51,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:51,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:05:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:05:51,631 INFO L87 Difference]: Start difference. First operand 16472 states and 26483 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) [2021-11-19 15:05:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:52,924 INFO L93 Difference]: Finished difference Result 32224 states and 52196 transitions. [2021-11-19 15:05:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:05:52,925 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 [2021-11-19 15:05:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:53,048 INFO L225 Difference]: With dead ends: 32224 [2021-11-19 15:05:53,049 INFO L226 Difference]: Without dead ends: 16500 [2021-11-19 15:05:53,336 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 [2021-11-19 15:05:53,337 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 700 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:53,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 2370 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:05:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16500 states. [2021-11-19 15:05:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16500 to 16480. [2021-11-19 15:05:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16480 states, 12448 states have (on average 1.5226542416452442) internal successors, (18954), 13039 states have internal predecessors, (18954), 3060 states have call successors, (3060), 855 states have call predecessors, (3060), 971 states have return successors, (4215), 3069 states have call predecessors, (4215), 3030 states have call successors, (4215) [2021-11-19 15:05:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16480 states to 16480 states and 26229 transitions. [2021-11-19 15:05:54,329 INFO L78 Accepts]: Start accepts. Automaton has 16480 states and 26229 transitions. Word has length 146 [2021-11-19 15:05:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:54,330 INFO L470 AbstractCegarLoop]: Abstraction has 16480 states and 26229 transitions. [2021-11-19 15:05:54,330 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) [2021-11-19 15:05:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16480 states and 26229 transitions. [2021-11-19 15:05:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 15:05:54,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:54,336 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] [2021-11-19 15:05:54,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:54,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:54,553 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1050870202, now seen corresponding path program 1 times [2021-11-19 15:05:54,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:54,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008818129] [2021-11-19 15:05:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:54,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:54,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:54,556 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:54,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:05:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:54,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:05:54,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:05:55,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-19 15:05:55,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:55,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008818129] [2021-11-19 15:05:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008818129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:55,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:55,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 15:05:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767009248] [2021-11-19 15:05:55,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:55,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:05:55,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:05:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:05:55,615 INFO L87 Difference]: Start difference. First operand 16480 states and 26229 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) [2021-11-19 15:05:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:57,147 INFO L93 Difference]: Finished difference Result 30546 states and 49150 transitions. [2021-11-19 15:05:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:05:57,149 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 [2021-11-19 15:05:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:57,270 INFO L225 Difference]: With dead ends: 30546 [2021-11-19 15:05:57,270 INFO L226 Difference]: Without dead ends: 16752 [2021-11-19 15:05:57,349 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 [2021-11-19 15:05:57,350 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 1317 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 3065 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:57,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 3065 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:05:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16752 states. [2021-11-19 15:05:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16752 to 16630. [2021-11-19 15:05:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16630 states, 12532 states have (on average 1.51915097350782) internal successors, (19038), 13165 states have internal predecessors, (19038), 3108 states have call successors, (3108), 879 states have call predecessors, (3108), 989 states have return successors, (4383), 3069 states have call predecessors, (4383), 3078 states have call successors, (4383) [2021-11-19 15:05:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16630 states to 16630 states and 26529 transitions. [2021-11-19 15:05:58,806 INFO L78 Accepts]: Start accepts. Automaton has 16630 states and 26529 transitions. Word has length 151 [2021-11-19 15:05:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:58,806 INFO L470 AbstractCegarLoop]: Abstraction has 16630 states and 26529 transitions. [2021-11-19 15:05:58,807 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) [2021-11-19 15:05:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 16630 states and 26529 transitions. [2021-11-19 15:05:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 15:05:58,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:58,811 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] [2021-11-19 15:05:58,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:59,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:59,029 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1401758162, now seen corresponding path program 1 times [2021-11-19 15:05:59,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:59,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819266486] [2021-11-19 15:05:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:59,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:59,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:59,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:59,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:05:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:05:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:05:59,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-19 15:06:00,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:00,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819266486] [2021-11-19 15:06:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819266486] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:06:00,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:06:00,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 15:06:00,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418530361] [2021-11-19 15:06:00,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:00,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:06:00,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:06:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:06:00,454 INFO L87 Difference]: Start difference. First operand 16630 states and 26529 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) [2021-11-19 15:06:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:04,903 INFO L93 Difference]: Finished difference Result 33825 states and 54468 transitions. [2021-11-19 15:06:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:06:04,905 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 [2021-11-19 15:06:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:05,018 INFO L225 Difference]: With dead ends: 33825 [2021-11-19 15:06:05,018 INFO L226 Difference]: Without dead ends: 19873 [2021-11-19 15:06:05,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:06:05,094 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 1404 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 3274 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:05,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 2820 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3274 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 15:06:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19873 states. [2021-11-19 15:06:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19873 to 18385. [2021-11-19 15:06:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18385 states, 13926 states have (on average 1.5089042079563406) internal successors, (21013), 14581 states have internal predecessors, (21013), 3316 states have call successors, (3316), 997 states have call predecessors, (3316), 1142 states have return successors, (4721), 3266 states have call predecessors, (4721), 3289 states have call successors, (4721) [2021-11-19 15:06:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18385 states to 18385 states and 29050 transitions. [2021-11-19 15:06:06,753 INFO L78 Accepts]: Start accepts. Automaton has 18385 states and 29050 transitions. Word has length 156 [2021-11-19 15:06:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:06,754 INFO L470 AbstractCegarLoop]: Abstraction has 18385 states and 29050 transitions. [2021-11-19 15:06:06,754 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) [2021-11-19 15:06:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 18385 states and 29050 transitions. [2021-11-19 15:06:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 15:06:06,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:06,759 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] [2021-11-19 15:06:06,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-19 15:06:06,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:06,973 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2103358036, now seen corresponding path program 1 times [2021-11-19 15:06:06,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:06,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816133446] [2021-11-19 15:06:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:06,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:06,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:06,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:06,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:06:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:06:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:06:07,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:06:08,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:08,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816133446] [2021-11-19 15:06:08,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816133446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:08,259 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:06:08,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-19 15:06:08,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831851878] [2021-11-19 15:06:08,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:08,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:06:08,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:06:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:06:08,262 INFO L87 Difference]: Start difference. First operand 18385 states and 29050 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) [2021-11-19 15:06:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:14,330 INFO L93 Difference]: Finished difference Result 36620 states and 58396 transitions. [2021-11-19 15:06:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:06:14,331 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 [2021-11-19 15:06:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:14,386 INFO L225 Difference]: With dead ends: 36620 [2021-11-19 15:06:14,387 INFO L226 Difference]: Without dead ends: 9483 [2021-11-19 15:06:14,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:06:14,709 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 1761 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 5173 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 5632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 5173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:14,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1862 Valid, 3449 Invalid, 5632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 5173 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 15:06:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2021-11-19 15:06:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 9390. [2021-11-19 15:06:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9390 states, 7297 states have (on average 1.518432232424284) internal successors, (11080), 7595 states have internal predecessors, (11080), 1493 states have call successors, (1493), 554 states have call predecessors, (1493), 599 states have return successors, (2033), 1442 states have call predecessors, (2033), 1484 states have call successors, (2033) [2021-11-19 15:06:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9390 states to 9390 states and 14606 transitions. [2021-11-19 15:06:15,495 INFO L78 Accepts]: Start accepts. Automaton has 9390 states and 14606 transitions. Word has length 156 [2021-11-19 15:06:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:15,496 INFO L470 AbstractCegarLoop]: Abstraction has 9390 states and 14606 transitions. [2021-11-19 15:06:15,496 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) [2021-11-19 15:06:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 9390 states and 14606 transitions. [2021-11-19 15:06:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-19 15:06:15,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:15,527 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:15,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:15,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:15,730 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -591866695, now seen corresponding path program 1 times [2021-11-19 15:06:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:15,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56175289] [2021-11-19 15:06:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:15,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:15,732 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:15,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:06:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:06:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2021-11-19 15:06:17,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-11-19 15:06:18,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:18,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56175289] [2021-11-19 15:06:18,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56175289] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:06:18,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:06:18,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 15:06:18,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379265842] [2021-11-19 15:06:18,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:18,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:06:18,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:06:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:06:18,203 INFO L87 Difference]: Start difference. First operand 9390 states and 14606 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 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) [2021-11-19 15:06:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:18,964 INFO L93 Difference]: Finished difference Result 18618 states and 29445 transitions. [2021-11-19 15:06:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:06:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 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 [2021-11-19 15:06:18,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:19,005 INFO L225 Difference]: With dead ends: 18618 [2021-11-19 15:06:19,005 INFO L226 Difference]: Without dead ends: 10048 [2021-11-19 15:06:19,032 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 [2021-11-19 15:06:19,032 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 68 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3986 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:19,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 3986 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:06:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10048 states. [2021-11-19 15:06:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10048 to 9470. [2021-11-19 15:06:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9470 states, 7361 states have (on average 1.5139247384866186) internal successors, (11144), 7659 states have internal predecessors, (11144), 1493 states have call successors, (1493), 554 states have call predecessors, (1493), 615 states have return successors, (2059), 1458 states have call predecessors, (2059), 1484 states have call successors, (2059) [2021-11-19 15:06:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9470 states to 9470 states and 14696 transitions. [2021-11-19 15:06:19,587 INFO L78 Accepts]: Start accepts. Automaton has 9470 states and 14696 transitions. Word has length 489 [2021-11-19 15:06:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:19,588 INFO L470 AbstractCegarLoop]: Abstraction has 9470 states and 14696 transitions. [2021-11-19 15:06:19,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 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) [2021-11-19 15:06:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9470 states and 14696 transitions. [2021-11-19 15:06:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-11-19 15:06:19,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:19,612 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:19,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:19,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:19,812 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash 382725777, now seen corresponding path program 1 times [2021-11-19 15:06:19,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:19,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197953704] [2021-11-19 15:06:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:19,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:19,815 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:19,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:06:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:20,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:06:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2021-11-19 15:06:21,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2021-11-19 15:06:22,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:22,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197953704] [2021-11-19 15:06:22,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197953704] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:06:22,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:06:22,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 15:06:22,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960808648] [2021-11-19 15:06:22,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:22,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:06:22,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:06:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:06:22,549 INFO L87 Difference]: Start difference. First operand 9470 states and 14696 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) [2021-11-19 15:06:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:27,269 INFO L93 Difference]: Finished difference Result 27270 states and 43164 transitions. [2021-11-19 15:06:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:06:27,270 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 497 [2021-11-19 15:06:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:27,339 INFO L225 Difference]: With dead ends: 27270 [2021-11-19 15:06:27,340 INFO L226 Difference]: Without dead ends: 17656 [2021-11-19 15:06:27,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 985 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:06:27,375 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 2361 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 3349 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 3988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 3349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:27,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2520 Valid, 2400 Invalid, 3988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 3349 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 15:06:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17656 states. [2021-11-19 15:06:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17656 to 16833. [2021-11-19 15:06:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16833 states, 12872 states have (on average 1.5066811684275947) internal successors, (19394), 13449 states have internal predecessors, (19394), 2795 states have call successors, (2795), 1058 states have call predecessors, (2795), 1165 states have return successors, (4088), 2705 states have call predecessors, (4088), 2782 states have call successors, (4088) [2021-11-19 15:06:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16833 states to 16833 states and 26277 transitions. [2021-11-19 15:06:28,511 INFO L78 Accepts]: Start accepts. Automaton has 16833 states and 26277 transitions. Word has length 497 [2021-11-19 15:06:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:28,512 INFO L470 AbstractCegarLoop]: Abstraction has 16833 states and 26277 transitions. [2021-11-19 15:06:28,512 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) [2021-11-19 15:06:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16833 states and 26277 transitions. [2021-11-19 15:06:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-19 15:06:28,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:28,545 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, 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] [2021-11-19 15:06:28,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 15:06:28,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:28,746 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1502920694, now seen corresponding path program 1 times [2021-11-19 15:06:28,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:28,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007509806] [2021-11-19 15:06:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:28,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:28,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:28,748 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:28,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:06:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:06:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 713 proven. 27 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-19 15:06:30,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2021-11-19 15:06:31,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:31,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007509806] [2021-11-19 15:06:31,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007509806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:31,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547321521] [2021-11-19 15:06:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:31,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:31,779 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:31,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 15:06:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:06:32,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 677 proven. 0 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2021-11-19 15:06:33,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2021-11-19 15:06:34,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547321521] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:06:34,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:06:34,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-19 15:06:34,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948284624] [2021-11-19 15:06:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:34,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:06:34,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:06:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:06:34,155 INFO L87 Difference]: Start difference. First operand 16833 states and 26277 transitions. Second operand has 9 states, 8 states have (on average 28.375) internal successors, (227), 9 states have internal predecessors, (227), 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) [2021-11-19 15:06:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:36,869 INFO L93 Difference]: Finished difference Result 47305 states and 75918 transitions. [2021-11-19 15:06:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 15:06:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 28.375) internal successors, (227), 9 states have internal predecessors, (227), 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 487 [2021-11-19 15:06:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:36,989 INFO L225 Difference]: With dead ends: 47305 [2021-11-19 15:06:36,989 INFO L226 Difference]: Without dead ends: 30052 [2021-11-19 15:06:37,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1924 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:06:37,068 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 752 mSDsluCounter, 8193 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 9495 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:37,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 9495 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 15:06:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30052 states. [2021-11-19 15:06:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30052 to 29534. [2021-11-19 15:06:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29534 states, 22405 states have (on average 1.511225172952466) internal successors, (33859), 23482 states have internal predecessors, (33859), 5134 states have call successors, (5134), 1862 states have call predecessors, (5134), 1994 states have return successors, (7587), 4949 states have call predecessors, (7587), 5111 states have call successors, (7587) [2021-11-19 15:06:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29534 states to 29534 states and 46580 transitions. [2021-11-19 15:06:38,904 INFO L78 Accepts]: Start accepts. Automaton has 29534 states and 46580 transitions. Word has length 487 [2021-11-19 15:06:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:38,905 INFO L470 AbstractCegarLoop]: Abstraction has 29534 states and 46580 transitions. [2021-11-19 15:06:38,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 28.375) internal successors, (227), 9 states have internal predecessors, (227), 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) [2021-11-19 15:06:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 29534 states and 46580 transitions. [2021-11-19 15:06:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-19 15:06:38,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:38,948 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] [2021-11-19 15:06:38,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:39,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-19 15:06:39,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:39,349 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash 335905687, now seen corresponding path program 1 times [2021-11-19 15:06:39,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:39,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357983002] [2021-11-19 15:06:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:39,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:39,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:39,352 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:39,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 15:06:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:39,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:06:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 744 proven. 12 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2021-11-19 15:06:40,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 71 proven. 105 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-11-19 15:06:42,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:42,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357983002] [2021-11-19 15:06:42,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357983002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:42,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270767929] [2021-11-19 15:06:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:42,154 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:42,155 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:42,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 15:06:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:06:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 664 proven. 12 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-19 15:06:43,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2021-11-19 15:06:45,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270767929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:45,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546678769] [2021-11-19 15:06:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:45,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:06:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:06:45,173 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:06:45,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 15:06:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:06:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 664 proven. 12 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-19 15:06:46,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2021-11-19 15:06:47,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546678769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:47,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:06:47,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-19 15:06:47,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21335494] [2021-11-19 15:06:47,440 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:06:47,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 15:06:47,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:47,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 15:06:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:06:47,444 INFO L87 Difference]: Start difference. First operand 29534 states and 46580 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) [2021-11-19 15:07:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:13,645 INFO L93 Difference]: Finished difference Result 85440 states and 140258 transitions. [2021-11-19 15:07:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-19 15:07:13,647 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 [2021-11-19 15:07:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:14,102 INFO L225 Difference]: With dead ends: 85440 [2021-11-19 15:07:14,102 INFO L226 Difference]: Without dead ends: 55720 [2021-11-19 15:07:14,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3017 GetRequests, 2932 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 15:07:14,309 INFO L933 BasicCegarLoop]: 2034 mSDtfsCounter, 14508 mSDsluCounter, 6069 mSDsCounter, 0 mSdLazyCounter, 18467 mSolverCounterSat, 6650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14508 SdHoareTripleChecker+Valid, 8103 SdHoareTripleChecker+Invalid, 25117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6650 IncrementalHoareTripleChecker+Valid, 18467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:14,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14508 Valid, 8103 Invalid, 25117 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6650 Valid, 18467 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2021-11-19 15:07:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55720 states. [2021-11-19 15:07:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55720 to 43579. [2021-11-19 15:07:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43579 states, 32758 states have (on average 1.4660846205507052) internal successors, (48026), 34271 states have internal predecessors, (48026), 7522 states have call successors, (7522), 3115 states have call predecessors, (7522), 3298 states have return successors, (11752), 7149 states have call predecessors, (11752), 7498 states have call successors, (11752) [2021-11-19 15:07:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43579 states to 43579 states and 67300 transitions. [2021-11-19 15:07:17,455 INFO L78 Accepts]: Start accepts. Automaton has 43579 states and 67300 transitions. Word has length 488 [2021-11-19 15:07:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:17,456 INFO L470 AbstractCegarLoop]: Abstraction has 43579 states and 67300 transitions. [2021-11-19 15:07:17,456 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) [2021-11-19 15:07:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43579 states and 67300 transitions. [2021-11-19 15:07:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-19 15:07:17,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:17,488 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] [2021-11-19 15:07:17,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 15:07:17,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-19 15:07:17,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:18,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:07:18,114 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash -908236367, now seen corresponding path program 1 times [2021-11-19 15:07:18,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:07:18,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268581222] [2021-11-19 15:07:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:18,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:07:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:07:18,117 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:07:18,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 15:07:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:07:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:07:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-19 15:07:19,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:07:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-19 15:07:20,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:07:20,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268581222] [2021-11-19 15:07:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268581222] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:07:20,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:07:20,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:07:20,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514815725] [2021-11-19 15:07:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:07:20,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:07:20,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:07:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:07:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:07:20,268 INFO L87 Difference]: Start difference. First operand 43579 states and 67300 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) [2021-11-19 15:07:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:23,140 INFO L93 Difference]: Finished difference Result 85427 states and 133529 transitions. [2021-11-19 15:07:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:07:23,140 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 [2021-11-19 15:07:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:23,325 INFO L225 Difference]: With dead ends: 85427 [2021-11-19 15:07:23,326 INFO L226 Difference]: Without dead ends: 44633 [2021-11-19 15:07:23,726 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 [2021-11-19 15:07:23,727 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 101 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:23,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2142 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:07:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-11-19 15:07:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 44633. [2021-11-19 15:07:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44633 states, 33734 states have (on average 1.462441453726211) internal successors, (49334), 35247 states have internal predecessors, (49334), 7522 states have call successors, (7522), 3193 states have call predecessors, (7522), 3376 states have return successors, (11752), 7149 states have call predecessors, (11752), 7498 states have call successors, (11752) [2021-11-19 15:07:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44633 states to 44633 states and 68608 transitions. [2021-11-19 15:07:26,872 INFO L78 Accepts]: Start accepts. Automaton has 44633 states and 68608 transitions. Word has length 502 [2021-11-19 15:07:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:26,873 INFO L470 AbstractCegarLoop]: Abstraction has 44633 states and 68608 transitions. [2021-11-19 15:07:26,873 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) [2021-11-19 15:07:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 44633 states and 68608 transitions. [2021-11-19 15:07:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-19 15:07:26,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:26,895 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, 3, 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] [2021-11-19 15:07:26,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:27,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:07:27,097 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1766565955, now seen corresponding path program 1 times [2021-11-19 15:07:27,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:07:27,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733415966] [2021-11-19 15:07:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:27,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:07:27,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:07:27,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:07:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 15:07:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:07:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:07:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-11-19 15:07:28,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:07:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-11-19 15:07:29,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:07:29,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733415966] [2021-11-19 15:07:29,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733415966] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:07:29,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:07:29,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:07:29,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533578820] [2021-11-19 15:07:29,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:07:29,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:07:29,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:07:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:07:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:07:29,495 INFO L87 Difference]: Start difference. First operand 44633 states and 68608 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2021-11-19 15:07:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:32,735 INFO L93 Difference]: Finished difference Result 87867 states and 136735 transitions. [2021-11-19 15:07:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:07:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 507 [2021-11-19 15:07:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:33,120 INFO L225 Difference]: With dead ends: 87867 [2021-11-19 15:07:33,120 INFO L226 Difference]: Without dead ends: 46115 [2021-11-19 15:07:33,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:07:33,263 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 99 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:33,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 2155 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:07:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46115 states. [2021-11-19 15:07:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46115 to 46115. [2021-11-19 15:07:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46115 states, 35134 states have (on average 1.4546023794614904) internal successors, (51106), 36647 states have internal predecessors, (51106), 7522 states have call successors, (7522), 3275 states have call predecessors, (7522), 3458 states have return successors, (11752), 7149 states have call predecessors, (11752), 7498 states have call successors, (11752) [2021-11-19 15:07:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46115 states to 46115 states and 70380 transitions. [2021-11-19 15:07:36,211 INFO L78 Accepts]: Start accepts. Automaton has 46115 states and 70380 transitions. Word has length 507 [2021-11-19 15:07:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:36,213 INFO L470 AbstractCegarLoop]: Abstraction has 46115 states and 70380 transitions. [2021-11-19 15:07:36,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2021-11-19 15:07:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46115 states and 70380 transitions. [2021-11-19 15:07:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-19 15:07:36,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:36,236 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:07:36,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:36,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:07:36,450 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1071770063, now seen corresponding path program 1 times [2021-11-19 15:07:36,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:07:36,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843468274] [2021-11-19 15:07:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:36,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:07:36,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:07:36,452 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:07:36,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8abd74f2-44ad-4f87-8593-aee7879eb78c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 15:07:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:07:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:07:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 746 proven. 0 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2021-11-19 15:07:38,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:07:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2021-11-19 15:07:38,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:07:38,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843468274] [2021-11-19 15:07:38,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843468274] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:07:38,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:07:38,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:07:38,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423905906] [2021-11-19 15:07:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:07:38,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:07:38,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:07:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:07:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:07:38,894 INFO L87 Difference]: Start difference. First operand 46115 states and 70380 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 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)