./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.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_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/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_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/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_ab388ece-3704-49ba-8ceb-b0901d14c55c/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:25:16,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:25:16,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:25:16,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:25:16,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:25:16,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:25:16,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:25:16,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:25:16,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:25:16,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:25:16,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:25:16,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:25:16,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:25:16,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:25:16,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:25:16,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:25:16,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:25:16,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:25:16,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:25:16,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:25:16,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:25:16,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:25:16,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:25:16,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:25:16,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:25:16,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:25:16,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:25:16,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:25:16,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:25:16,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:25:16,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:25:16,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:25:16,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:25:16,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:25:16,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:25:16,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:25:16,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:25:16,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:25:16,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:25:16,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:25:16,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:25:16,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:25:16,851 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:25:16,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:25:16,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:25:16,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:25:16,854 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:25:16,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:25:16,855 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:25:16,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:25:16,855 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:25:16,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:25:16,864 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:25:16,865 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:25:16,865 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:25:16,865 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:25:16,866 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:25:16,866 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:25:16,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:25:16,867 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:25:16,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:25:16,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:25:16,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:25:16,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:25:16,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:25:16,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:25:16,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:25:16,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:25:16,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:25:16,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:25:16,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:25:16,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:25:16,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:25:16,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:25:16,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:25:16,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:25:16,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:25:16,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:25:16,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:25:16,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:25:16,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:25:16,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:25:16,875 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-19 14:25:17,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:25:17,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:25:17,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:25:17,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:25:17,324 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:25:17,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-19 14:25:17,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/29bc8ddb6/009c204f98d549b48c943d6da9bc9a7b/FLAGae3f6def2 [2021-11-19 14:25:18,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:25:18,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-19 14:25:18,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/29bc8ddb6/009c204f98d549b48c943d6da9bc9a7b/FLAGae3f6def2 [2021-11-19 14:25:18,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/29bc8ddb6/009c204f98d549b48c943d6da9bc9a7b [2021-11-19 14:25:18,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:25:18,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:25:18,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:25:18,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:25:18,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:25:18,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:25:18" (1/1) ... [2021-11-19 14:25:18,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f63f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:18, skipping insertion in model container [2021-11-19 14:25:18,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:25:18" (1/1) ... [2021-11-19 14:25:18,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:25:18,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:25:18,708 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-19 14:25:19,156 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:25:19,167 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 14:25:19,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7916652f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:19, skipping insertion in model container [2021-11-19 14:25:19,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:25:19,168 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:25:19,170 INFO L158 Benchmark]: Toolchain (without parser) took 814.51ms. Allocated memory is still 117.4MB. Free memory was 76.6MB in the beginning and 77.3MB in the end (delta: -792.4kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:25:19,171 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory was 87.4MB in the beginning and 87.4MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:25:19,172 INFO L158 Benchmark]: CACSL2BoogieTranslator took 809.11ms. Allocated memory is still 117.4MB. Free memory was 76.4MB in the beginning and 77.8MB in the end (delta: -1.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:25:19,174 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory was 87.4MB in the beginning and 87.4MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 809.11ms. Allocated memory is still 117.4MB. Free memory was 76.4MB in the beginning and 77.8MB in the end (delta: -1.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2095]: 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/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_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/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_ab388ece-3704-49ba-8ceb-b0901d14c55c/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:25:21,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:25:21,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:25:21,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:25:21,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:25:21,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:25:21,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:25:21,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:25:21,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:25:21,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:25:21,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:25:21,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:25:21,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:25:21,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:25:21,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:25:21,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:25:21,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:25:21,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:25:21,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:25:21,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:25:21,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:25:21,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:25:21,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:25:21,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:25:21,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:25:21,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:25:21,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:25:21,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:25:21,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:25:21,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:25:21,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:25:21,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:25:21,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:25:21,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:25:21,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:25:21,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:25:21,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:25:21,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:25:21,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:25:21,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:25:21,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:25:21,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:25:21,863 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:25:21,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:25:21,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:25:21,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:25:21,866 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:25:21,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:25:21,867 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:25:21,867 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:25:21,868 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:25:21,868 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:25:21,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:25:21,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:25:21,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:25:21,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:25:21,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:25:21,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:25:21,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:25:21,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:25:21,873 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:25:21,873 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:25:21,873 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:25:21,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:25:21,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:25:21,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:25:21,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:25:21,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:25:21,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:25:21,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:25:21,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:25:21,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:25:21,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:25:21,877 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:25:21,877 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:25:21,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:25:21,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:25:21,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:25:21,878 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-19 14:25:22,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:25:22,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:25:22,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:25:22,401 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:25:22,404 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:25:22,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-19 14:25:22,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/bcb2dbcd3/25cde755d9c54fa8afcabc10790a5903/FLAGacee07950 [2021-11-19 14:25:23,392 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:25:23,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-19 14:25:23,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/bcb2dbcd3/25cde755d9c54fa8afcabc10790a5903/FLAGacee07950 [2021-11-19 14:25:23,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/data/bcb2dbcd3/25cde755d9c54fa8afcabc10790a5903 [2021-11-19 14:25:23,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:25:23,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:25:23,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:25:23,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:25:23,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:25:23,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:25:23" (1/1) ... [2021-11-19 14:25:23,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282519be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:23, skipping insertion in model container [2021-11-19 14:25:23,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:25:23" (1/1) ... [2021-11-19 14:25:23,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:25:24,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:25:24,275 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-19 14:25:24,768 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:25:24,782 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:25:24,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:25:24,818 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-19 14:25:25,012 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:25:25,017 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:25:25,031 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_ab388ece-3704-49ba-8ceb-b0901d14c55c/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-19 14:25:25,108 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:25:25,146 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:25:25,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25 WrapperNode [2021-11-19 14:25:25,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:25:25,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:25:25,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:25:25,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:25:25,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,317 INFO L137 Inliner]: procedures = 94, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1036 [2021-11-19 14:25:25,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:25:25,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:25:25,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:25:25,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:25:25,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:25:25,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:25:25,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:25:25,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:25:25,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (1/1) ... [2021-11-19 14:25:25,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:25:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:25:25,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:25:25,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:25:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:25:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:25:25,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:25:25,505 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:25:25,505 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:25:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:25:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:25:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:25:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:25:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:25:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:25:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:25:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:25:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:25:25,507 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:25:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:25:25,508 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:25:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:25:25,508 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:25:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:25:25,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:25:25,509 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:25:25,509 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:25:25,509 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:25:25,509 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:25:25,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:25:25,510 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:25:25,510 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:25:25,510 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:25:25,511 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:25:25,511 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:25:25,512 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:25:25,512 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:25:25,512 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:25:25,513 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:25:25,513 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:25:25,513 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:25:25,513 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:25:25,513 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:25:25,513 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:25:25,514 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:25:25,514 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:25:25,514 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:25:25,514 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:25:25,515 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:25:25,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:25:25,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:25:25,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:25:25,516 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:25:25,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:25:25,776 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:25:25,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:25:27,363 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:25:27,380 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:25:27,381 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:25:27,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:25:27 BoogieIcfgContainer [2021-11-19 14:25:27,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:25:27,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:25:27,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:25:27,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:25:27,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:25:23" (1/3) ... [2021-11-19 14:25:27,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f7a605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:25:27, skipping insertion in model container [2021-11-19 14:25:27,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:25:25" (2/3) ... [2021-11-19 14:25:27,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f7a605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:25:27, skipping insertion in model container [2021-11-19 14:25:27,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:25:27" (3/3) ... [2021-11-19 14:25:27,396 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2021-11-19 14:25:27,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:25:27,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:25:27,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:25:27,481 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 14:25:27,482 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:25:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 541 states, 423 states have (on average 1.6784869976359338) internal successors, (710), 439 states have internal predecessors, (710), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:25:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:25:27,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:27,612 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 14:25:27,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1734862310, now seen corresponding path program 1 times [2021-11-19 14:25:27,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:27,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856577889] [2021-11-19 14:25:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:27,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:27,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:27,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:27,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:25:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:25:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:28,563 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 14:25:28,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:28,990 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 14:25:28,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:28,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856577889] [2021-11-19 14:25:28,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856577889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:28,992 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:28,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:25:28,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257711860] [2021-11-19 14:25:28,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:29,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:25:29,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:25:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:25:29,041 INFO L87 Difference]: Start difference. First operand has 541 states, 423 states have (on average 1.6784869976359338) internal successors, (710), 439 states have internal predecessors, (710), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:25:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:29,348 INFO L93 Difference]: Finished difference Result 1077 states and 1794 transitions. [2021-11-19 14:25:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:29,352 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 14:25:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:29,400 INFO L225 Difference]: With dead ends: 1077 [2021-11-19 14:25:29,401 INFO L226 Difference]: Without dead ends: 536 [2021-11-19 14:25:29,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:25:29,431 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 16 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:29,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 2628 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:25:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-19 14:25:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2021-11-19 14:25:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.6563245823389021) internal successors, (694), 434 states have internal predecessors, (694), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:25:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 879 transitions. [2021-11-19 14:25:29,591 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 879 transitions. Word has length 101 [2021-11-19 14:25:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:29,592 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 879 transitions. [2021-11-19 14:25:29,592 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 14:25:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 879 transitions. [2021-11-19 14:25:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:25:29,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:29,602 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 14:25:29,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:29,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:29,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash -583314525, now seen corresponding path program 1 times [2021-11-19 14:25:29,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:29,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055258671] [2021-11-19 14:25:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:29,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:29,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:29,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:25:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:30,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:25:30,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:30,578 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 14:25:30,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:31,073 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 14:25:31,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:31,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055258671] [2021-11-19 14:25:31,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055258671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:31,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:31,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:25:31,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708170328] [2021-11-19 14:25:31,074 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:31,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:25:31,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:25:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:25:31,078 INFO L87 Difference]: Start difference. First operand 536 states and 879 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 14:25:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:31,307 INFO L93 Difference]: Finished difference Result 1060 states and 1750 transitions. [2021-11-19 14:25:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:25:31,309 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 14:25:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:31,315 INFO L225 Difference]: With dead ends: 1060 [2021-11-19 14:25:31,315 INFO L226 Difference]: Without dead ends: 545 [2021-11-19 14:25:31,321 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 14:25:31,322 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 214 mSDsluCounter, 4290 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:31,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5153 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:25:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-19 14:25:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-19 14:25:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 427 states have (on average 1.6557377049180328) internal successors, (707), 443 states have internal predecessors, (707), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 14:25:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 893 transitions. [2021-11-19 14:25:31,372 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 893 transitions. Word has length 106 [2021-11-19 14:25:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:31,373 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 893 transitions. [2021-11-19 14:25:31,373 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 14:25:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 893 transitions. [2021-11-19 14:25:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:25:31,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:31,379 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 14:25:31,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:31,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:31,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2053443708, now seen corresponding path program 1 times [2021-11-19 14:25:31,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:31,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851527019] [2021-11-19 14:25:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:31,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:31,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:31,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:31,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:25:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:25:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:32,276 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 14:25:32,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:32,703 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 14:25:32,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:32,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851527019] [2021-11-19 14:25:32,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851527019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:32,709 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:32,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:25:32,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504299953] [2021-11-19 14:25:32,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:32,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:25:32,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:25:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:25:32,714 INFO L87 Difference]: Start difference. First operand 545 states and 893 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 14:25:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:33,054 INFO L93 Difference]: Finished difference Result 1116 states and 1841 transitions. [2021-11-19 14:25:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:33,077 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 14:25:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:33,082 INFO L225 Difference]: With dead ends: 1116 [2021-11-19 14:25:33,082 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 14:25:33,087 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 14:25:33,089 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 136 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4022 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:33,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 4022 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:25:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 14:25:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 550. [2021-11-19 14:25:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 432 states have (on average 1.5972222222222223) internal successors, (690), 447 states have internal predecessors, (690), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:25:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 875 transitions. [2021-11-19 14:25:33,131 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 875 transitions. Word has length 107 [2021-11-19 14:25:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:33,132 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 875 transitions. [2021-11-19 14:25:33,132 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 14:25:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 875 transitions. [2021-11-19 14:25:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:25:33,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:33,149 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 14:25:33,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:33,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:33,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1464940279, now seen corresponding path program 1 times [2021-11-19 14:25:33,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:33,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101008737] [2021-11-19 14:25:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:33,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:33,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:33,362 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:33,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:25:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:25:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:34,042 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 14:25:34,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:34,431 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 14:25:34,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:34,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101008737] [2021-11-19 14:25:34,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101008737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:34,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:34,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:25:34,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838675125] [2021-11-19 14:25:34,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:34,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:25:34,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:25:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:25:34,438 INFO L87 Difference]: Start difference. First operand 550 states and 875 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 14:25:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:34,653 INFO L93 Difference]: Finished difference Result 1058 states and 1704 transitions. [2021-11-19 14:25:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:25:34,655 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 14:25:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:34,661 INFO L225 Difference]: With dead ends: 1058 [2021-11-19 14:25:34,661 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 14:25:34,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:25:34,668 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 137 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4177 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 14:25:34,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4177 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:25:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 14:25:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 529. [2021-11-19 14:25:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.610705596107056) internal successors, (662), 426 states have internal predecessors, (662), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:25:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 847 transitions. [2021-11-19 14:25:34,707 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 847 transitions. Word has length 109 [2021-11-19 14:25:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:34,707 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 847 transitions. [2021-11-19 14:25:34,708 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 14:25:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 847 transitions. [2021-11-19 14:25:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:25:34,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:34,713 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 14:25:34,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:34,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:34,928 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1161868368, now seen corresponding path program 1 times [2021-11-19 14:25:34,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:34,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542256808] [2021-11-19 14:25:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:34,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:34,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:34,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:25:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:25:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:35,541 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 14:25:35,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:36,116 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 14:25:36,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:36,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542256808] [2021-11-19 14:25:36,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542256808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:36,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:36,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:25:36,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202008683] [2021-11-19 14:25:36,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:36,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:25:36,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:36,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:25:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:25:36,120 INFO L87 Difference]: Start difference. First operand 529 states and 847 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 14:25:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:36,536 INFO L93 Difference]: Finished difference Result 1027 states and 1659 transitions. [2021-11-19 14:25:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:25:36,537 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 14:25:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:36,543 INFO L225 Difference]: With dead ends: 1027 [2021-11-19 14:25:36,543 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 14:25:36,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:25:36,549 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 45 mSDsluCounter, 8784 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 9588 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:36,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 9588 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:25:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 14:25:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 531. [2021-11-19 14:25:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 413 states have (on average 1.6053268765133173) internal successors, (663), 428 states have internal predecessors, (663), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:25:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 848 transitions. [2021-11-19 14:25:36,581 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 848 transitions. Word has length 112 [2021-11-19 14:25:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:36,581 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 848 transitions. [2021-11-19 14:25:36,582 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 14:25:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 848 transitions. [2021-11-19 14:25:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:25:36,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:36,586 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 14:25:36,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:36,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:36,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1052870499, now seen corresponding path program 1 times [2021-11-19 14:25:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:36,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126554760] [2021-11-19 14:25:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:36,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:36,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:36,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:25:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:37,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:25:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:37,525 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 14:25:37,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:38,031 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 14:25:38,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:38,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126554760] [2021-11-19 14:25:38,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126554760] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:25:38,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:25:38,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:25:38,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515295332] [2021-11-19 14:25:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:38,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:25:38,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:25:38,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:25:38,036 INFO L87 Difference]: Start difference. First operand 531 states and 848 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 14:25:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:39,120 INFO L93 Difference]: Finished difference Result 1023 states and 1677 transitions. [2021-11-19 14:25:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:39,123 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 14:25:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:39,128 INFO L225 Difference]: With dead ends: 1023 [2021-11-19 14:25:39,128 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 14:25:39,135 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 14:25:39,137 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 780 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:39,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2047 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:25:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 14:25:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 14:25:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 416 states have (on average 1.6009615384615385) internal successors, (666), 431 states have internal predecessors, (666), 93 states have call successors, (93), 26 states have call predecessors, (93), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 14:25:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 852 transitions. [2021-11-19 14:25:39,223 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 852 transitions. Word has length 113 [2021-11-19 14:25:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:39,223 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 852 transitions. [2021-11-19 14:25:39,224 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 14:25:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 852 transitions. [2021-11-19 14:25:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:25:39,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:39,229 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 14:25:39,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:39,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:39,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1995321546, now seen corresponding path program 1 times [2021-11-19 14:25:39,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:39,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185060659] [2021-11-19 14:25:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:39,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:39,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:39,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:25:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:25:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:40,158 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 14:25:40,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:40,599 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 14:25:40,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185060659] [2021-11-19 14:25:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185060659] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:25:40,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:25:40,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:25:40,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131558760] [2021-11-19 14:25:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:40,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:25:40,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:25:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:25:40,602 INFO L87 Difference]: Start difference. First operand 535 states and 852 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 14:25:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:41,684 INFO L93 Difference]: Finished difference Result 1032 states and 1684 transitions. [2021-11-19 14:25:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:41,685 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 14:25:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:41,691 INFO L225 Difference]: With dead ends: 1032 [2021-11-19 14:25:41,691 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:25:41,697 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 14:25:41,698 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 778 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:41,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 2048 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:25:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:25:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 14:25:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 420 states have (on average 1.5952380952380953) internal successors, (670), 435 states have internal predecessors, (670), 93 states have call successors, (93), 27 states have call predecessors, (93), 26 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-19 14:25:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 857 transitions. [2021-11-19 14:25:41,740 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 857 transitions. Word has length 116 [2021-11-19 14:25:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:41,743 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 857 transitions. [2021-11-19 14:25:41,743 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 14:25:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 857 transitions. [2021-11-19 14:25:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:25:41,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:41,748 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 14:25:41,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:41,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:41,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -44289537, now seen corresponding path program 1 times [2021-11-19 14:25:41,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:41,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621651548] [2021-11-19 14:25:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:41,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:41,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:41,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:41,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:25:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:25:42,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:42,636 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 14:25:42,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:43,067 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 14:25:43,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:43,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621651548] [2021-11-19 14:25:43,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621651548] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:25:43,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:25:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:25:43,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23194354] [2021-11-19 14:25:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:43,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:25:43,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:25:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:25:43,070 INFO L87 Difference]: Start difference. First operand 540 states and 857 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 14:25:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:44,060 INFO L93 Difference]: Finished difference Result 1043 states and 1693 transitions. [2021-11-19 14:25:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:44,061 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 14:25:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:44,066 INFO L225 Difference]: With dead ends: 1043 [2021-11-19 14:25:44,066 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:25:44,071 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 14:25:44,072 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 778 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:44,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 2048 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:25:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:25:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 14:25:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 425 states have (on average 1.588235294117647) internal successors, (675), 440 states have internal predecessors, (675), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-19 14:25:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 863 transitions. [2021-11-19 14:25:44,104 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 863 transitions. Word has length 119 [2021-11-19 14:25:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:44,104 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 863 transitions. [2021-11-19 14:25:44,104 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 14:25:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 863 transitions. [2021-11-19 14:25:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:25:44,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:44,109 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 14:25:44,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:44,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:44,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1944870282, now seen corresponding path program 1 times [2021-11-19 14:25:44,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:44,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777172859] [2021-11-19 14:25:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:44,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:44,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:44,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:25:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:25:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:44,948 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 14:25:44,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:45,434 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 14:25:45,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:45,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777172859] [2021-11-19 14:25:45,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777172859] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:25:45,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:25:45,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:25:45,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721336482] [2021-11-19 14:25:45,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:45,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:25:45,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:25:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:25:45,437 INFO L87 Difference]: Start difference. First operand 546 states and 863 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 14:25:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:46,428 INFO L93 Difference]: Finished difference Result 1056 states and 1704 transitions. [2021-11-19 14:25:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:46,429 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 14:25:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:46,433 INFO L225 Difference]: With dead ends: 1056 [2021-11-19 14:25:46,433 INFO L226 Difference]: Without dead ends: 553 [2021-11-19 14:25:46,438 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 14:25:46,439 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 775 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:46,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2048 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:25:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-19 14:25:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-19 14:25:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 431 states have (on average 1.580046403712297) internal successors, (681), 446 states have internal predecessors, (681), 93 states have call successors, (93), 29 states have call predecessors, (93), 28 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-19 14:25:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 870 transitions. [2021-11-19 14:25:46,475 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 870 transitions. Word has length 122 [2021-11-19 14:25:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:46,476 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 870 transitions. [2021-11-19 14:25:46,476 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 14:25:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 870 transitions. [2021-11-19 14:25:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:25:46,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:46,481 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 14:25:46,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:46,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:46,700 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:46,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1449268891, now seen corresponding path program 1 times [2021-11-19 14:25:46,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:46,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432123487] [2021-11-19 14:25:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:46,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:46,703 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:46,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:25:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:25:47,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:47,373 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 14:25:47,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:47,993 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 14:25:47,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:47,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432123487] [2021-11-19 14:25:47,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432123487] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:25:47,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:25:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-19 14:25:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956345778] [2021-11-19 14:25:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:25:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:25:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:25:47,997 INFO L87 Difference]: Start difference. First operand 553 states and 870 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 14:25:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:55,803 INFO L93 Difference]: Finished difference Result 1869 states and 3021 transitions. [2021-11-19 14:25:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:25:55,804 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 14:25:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:55,819 INFO L225 Difference]: With dead ends: 1869 [2021-11-19 14:25:55,819 INFO L226 Difference]: Without dead ends: 1359 [2021-11-19 14:25:55,824 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 14:25:55,825 INFO L933 BasicCegarLoop]: 1461 mSDtfsCounter, 1638 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 5927 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 6552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 5927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:55,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1742 Valid, 4860 Invalid, 6552 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [625 Valid, 5927 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 14:25:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-11-19 14:25:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1137. [2021-11-19 14:25:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 864 states have (on average 1.5844907407407407) internal successors, (1369), 901 states have internal predecessors, (1369), 212 states have call successors, (212), 55 states have call predecessors, (212), 60 states have return successors, (237), 211 states have call predecessors, (237), 210 states have call successors, (237) [2021-11-19 14:25:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1818 transitions. [2021-11-19 14:25:55,927 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1818 transitions. Word has length 125 [2021-11-19 14:25:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:55,928 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1818 transitions. [2021-11-19 14:25:55,928 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 14:25:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1818 transitions. [2021-11-19 14:25:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:25:55,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:55,937 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 14:25:55,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:56,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:56,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash 442512690, now seen corresponding path program 1 times [2021-11-19 14:25:56,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:56,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203958717] [2021-11-19 14:25:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:56,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:56,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:56,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:25:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:25:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:56,791 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 14:25:56,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:57,319 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 14:25:57,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:57,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203958717] [2021-11-19 14:25:57,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203958717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:57,319 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:57,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:25:57,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040015124] [2021-11-19 14:25:57,320 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:57,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:25:57,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:25:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:25:57,322 INFO L87 Difference]: Start difference. First operand 1137 states and 1818 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 14:25:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:57,650 INFO L93 Difference]: Finished difference Result 2201 states and 3543 transitions. [2021-11-19 14:25:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:25:57,652 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 14:25:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:57,665 INFO L225 Difference]: With dead ends: 2201 [2021-11-19 14:25:57,665 INFO L226 Difference]: Without dead ends: 1097 [2021-11-19 14:25:57,673 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 14:25:57,674 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 80 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 5587 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:57,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 5587 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:25:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-11-19 14:25:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1094. [2021-11-19 14:25:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 832 states have (on average 1.5913461538461537) internal successors, (1324), 868 states have internal predecessors, (1324), 206 states have call successors, (206), 52 states have call predecessors, (206), 55 states have return successors, (224), 204 states have call predecessors, (224), 204 states have call successors, (224) [2021-11-19 14:25:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1754 transitions. [2021-11-19 14:25:57,753 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1754 transitions. Word has length 128 [2021-11-19 14:25:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:57,753 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1754 transitions. [2021-11-19 14:25:57,753 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 14:25:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1754 transitions. [2021-11-19 14:25:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:25:57,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:57,758 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 14:25:57,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:57,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:57,976 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash -467176545, now seen corresponding path program 1 times [2021-11-19 14:25:57,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:57,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31631704] [2021-11-19 14:25:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:57,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:57,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:57,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:58,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:25:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:25:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:58,753 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 14:25:58,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:59,400 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 14:25:59,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:59,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31631704] [2021-11-19 14:25:59,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31631704] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:25:59,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:25:59,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-19 14:25:59,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82507936] [2021-11-19 14:25:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:59,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:25:59,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:25:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:25:59,403 INFO L87 Difference]: Start difference. First operand 1094 states and 1754 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 14:26:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:03,940 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2021-11-19 14:26:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:26:03,941 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 14:26:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:03,959 INFO L225 Difference]: With dead ends: 2738 [2021-11-19 14:26:03,959 INFO L226 Difference]: Without dead ends: 1684 [2021-11-19 14:26:03,967 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 14:26:03,968 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1966 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:03,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2068 Valid, 1884 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 14:26:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-11-19 14:26:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1643. [2021-11-19 14:26:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1239 states have (on average 1.5948345439870864) internal successors, (1976), 1296 states have internal predecessors, (1976), 319 states have call successors, (319), 75 states have call predecessors, (319), 84 states have return successors, (362), 320 states have call predecessors, (362), 316 states have call successors, (362) [2021-11-19 14:26:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2657 transitions. [2021-11-19 14:26:04,085 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2657 transitions. Word has length 131 [2021-11-19 14:26:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:04,086 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2657 transitions. [2021-11-19 14:26:04,086 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 14:26:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2657 transitions. [2021-11-19 14:26:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:26:04,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:04,091 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 14:26:04,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 14:26:04,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:04,310 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2012855590, now seen corresponding path program 1 times [2021-11-19 14:26:04,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:04,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307684998] [2021-11-19 14:26:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:04,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:04,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:04,313 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:04,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:26:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:26:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:04,995 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 14:26:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:05,448 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 14:26:05,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:05,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307684998] [2021-11-19 14:26:05,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307684998] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:05,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:26:05,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 14:26:05,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333199491] [2021-11-19 14:26:05,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:05,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:26:05,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:26:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:05,452 INFO L87 Difference]: Start difference. First operand 1643 states and 2657 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 14:26:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:06,584 INFO L93 Difference]: Finished difference Result 4707 states and 7680 transitions. [2021-11-19 14:26:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:26:06,586 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 14:26:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:06,620 INFO L225 Difference]: With dead ends: 4707 [2021-11-19 14:26:06,621 INFO L226 Difference]: Without dead ends: 3104 [2021-11-19 14:26:06,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:26:06,638 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 674 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:06,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2726 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:26:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-19 14:26:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3089. [2021-11-19 14:26:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 2312 states have (on average 1.5735294117647058) internal successors, (3638), 2422 states have internal predecessors, (3638), 616 states have call successors, (616), 150 states have call predecessors, (616), 160 states have return successors, (695), 611 states have call predecessors, (695), 610 states have call successors, (695) [2021-11-19 14:26:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4949 transitions. [2021-11-19 14:26:06,880 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4949 transitions. Word has length 132 [2021-11-19 14:26:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:06,881 INFO L470 AbstractCegarLoop]: Abstraction has 3089 states and 4949 transitions. [2021-11-19 14:26:06,881 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 14:26:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4949 transitions. [2021-11-19 14:26:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:26:06,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:06,886 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 14:26:06,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:07,104 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2003536712, now seen corresponding path program 1 times [2021-11-19 14:26:07,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:07,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084939455] [2021-11-19 14:26:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:07,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:07,106 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:07,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:26:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:26:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:07,708 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 14:26:07,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:08,033 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 14:26:08,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:08,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084939455] [2021-11-19 14:26:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084939455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:08,033 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:08,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-19 14:26:08,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941781467] [2021-11-19 14:26:08,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:26:08,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:26:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:08,035 INFO L87 Difference]: Start difference. First operand 3089 states and 4949 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 14:26:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:10,513 INFO L93 Difference]: Finished difference Result 9126 states and 14838 transitions. [2021-11-19 14:26:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:26:10,514 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 14:26:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:10,583 INFO L225 Difference]: With dead ends: 9126 [2021-11-19 14:26:10,583 INFO L226 Difference]: Without dead ends: 6077 [2021-11-19 14:26:10,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:26:10,612 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 1550 mSDsluCounter, 3677 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 5277 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:10,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 5277 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 14:26:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-11-19 14:26:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 6051. [2021-11-19 14:26:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6051 states, 4530 states have (on average 1.5690949227373068) internal successors, (7108), 4749 states have internal predecessors, (7108), 1203 states have call successors, (1203), 297 states have call predecessors, (1203), 317 states have return successors, (1502), 1194 states have call predecessors, (1502), 1191 states have call successors, (1502) [2021-11-19 14:26:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6051 states to 6051 states and 9813 transitions. [2021-11-19 14:26:11,158 INFO L78 Accepts]: Start accepts. Automaton has 6051 states and 9813 transitions. Word has length 134 [2021-11-19 14:26:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:11,159 INFO L470 AbstractCegarLoop]: Abstraction has 6051 states and 9813 transitions. [2021-11-19 14:26:11,161 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 14:26:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6051 states and 9813 transitions. [2021-11-19 14:26:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:26:11,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:11,166 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 14:26:11,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:11,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:11,382 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:11,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:11,382 INFO L85 PathProgramCache]: Analyzing trace with hash -509930649, now seen corresponding path program 1 times [2021-11-19 14:26:11,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:11,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750575072] [2021-11-19 14:26:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:11,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:11,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:11,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:26:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:26:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:12,115 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 14:26:12,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:12,520 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 14:26:12,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:12,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750575072] [2021-11-19 14:26:12,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750575072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:12,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:12,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-19 14:26:12,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785535176] [2021-11-19 14:26:12,521 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:12,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:26:12,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:26:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:26:12,524 INFO L87 Difference]: Start difference. First operand 6051 states and 9813 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 14:26:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:14,179 INFO L93 Difference]: Finished difference Result 13873 states and 22613 transitions. [2021-11-19 14:26:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:26:14,180 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 14:26:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:14,299 INFO L225 Difference]: With dead ends: 13873 [2021-11-19 14:26:14,299 INFO L226 Difference]: Without dead ends: 10046 [2021-11-19 14:26:14,321 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 14:26:14,321 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 1629 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:14,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1641 Valid, 3013 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:26:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-11-19 14:26:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9786. [2021-11-19 14:26:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9786 states, 7372 states have (on average 1.5613130765056973) internal successors, (11510), 7715 states have internal predecessors, (11510), 1862 states have call successors, (1862), 489 states have call predecessors, (1862), 551 states have return successors, (2423), 1869 states have call predecessors, (2423), 1844 states have call successors, (2423) [2021-11-19 14:26:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9786 states to 9786 states and 15795 transitions. [2021-11-19 14:26:15,241 INFO L78 Accepts]: Start accepts. Automaton has 9786 states and 15795 transitions. Word has length 134 [2021-11-19 14:26:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:15,242 INFO L470 AbstractCegarLoop]: Abstraction has 9786 states and 15795 transitions. [2021-11-19 14:26:15,243 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 14:26:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9786 states and 15795 transitions. [2021-11-19 14:26:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:26:15,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:15,249 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 14:26:15,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:15,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:15,464 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1126143401, now seen corresponding path program 1 times [2021-11-19 14:26:15,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:15,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116336297] [2021-11-19 14:26:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:15,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:15,466 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:15,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:26:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:26:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:16,252 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 14:26:16,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:16,903 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 14:26:16,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:16,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116336297] [2021-11-19 14:26:16,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116336297] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:16,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:26:16,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-19 14:26:16,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137449989] [2021-11-19 14:26:16,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:26:16,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:16,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:26:16,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:26:16,907 INFO L87 Difference]: Start difference. First operand 9786 states and 15795 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 14:26:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:22,230 INFO L93 Difference]: Finished difference Result 17264 states and 27866 transitions. [2021-11-19 14:26:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:26:22,231 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 14:26:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:22,311 INFO L225 Difference]: With dead ends: 17264 [2021-11-19 14:26:22,311 INFO L226 Difference]: Without dead ends: 9896 [2021-11-19 14:26:22,351 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 14:26:22,352 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1884 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1988 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 4534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:22,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1988 Valid, 2565 Invalid, 4534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:26:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9896 states. [2021-11-19 14:26:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9896 to 9742. [2021-11-19 14:26:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9742 states, 7348 states have (on average 1.5609689711486119) internal successors, (11470), 7691 states have internal predecessors, (11470), 1846 states have call successors, (1846), 485 states have call predecessors, (1846), 547 states have return successors, (2407), 1853 states have call predecessors, (2407), 1828 states have call successors, (2407) [2021-11-19 14:26:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9742 states to 9742 states and 15723 transitions. [2021-11-19 14:26:23,251 INFO L78 Accepts]: Start accepts. Automaton has 9742 states and 15723 transitions. Word has length 136 [2021-11-19 14:26:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:23,252 INFO L470 AbstractCegarLoop]: Abstraction has 9742 states and 15723 transitions. [2021-11-19 14:26:23,252 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 14:26:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9742 states and 15723 transitions. [2021-11-19 14:26:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:26:23,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:23,256 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 14:26:23,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 14:26:23,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:23,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2013018717, now seen corresponding path program 1 times [2021-11-19 14:26:23,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:23,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759165301] [2021-11-19 14:26:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:23,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:23,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:23,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:23,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:26:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:23,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:26:23,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:24,172 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 14:26:24,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:24,720 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 14:26:24,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:24,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759165301] [2021-11-19 14:26:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759165301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:24,721 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:24,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-19 14:26:24,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189406739] [2021-11-19 14:26:24,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:26:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:26:24,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:26:24,724 INFO L87 Difference]: Start difference. First operand 9742 states and 15723 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 14:26:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:28,387 INFO L93 Difference]: Finished difference Result 24538 states and 39786 transitions. [2021-11-19 14:26:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:26:28,389 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 14:26:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:28,527 INFO L225 Difference]: With dead ends: 24538 [2021-11-19 14:26:28,528 INFO L226 Difference]: Without dead ends: 17044 [2021-11-19 14:26:28,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:26:28,581 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 2001 mSDsluCounter, 3583 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 4722 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:28,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 4722 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 14:26:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-11-19 14:26:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16922. [2021-11-19 14:26:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16922 states, 12804 states have (on average 1.5427991252733522) internal successors, (19754), 13391 states have internal predecessors, (19754), 3120 states have call successors, (3120), 885 states have call predecessors, (3120), 997 states have return successors, (4269), 3129 states have call predecessors, (4269), 3090 states have call successors, (4269) [2021-11-19 14:26:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16922 states to 16922 states and 27143 transitions. [2021-11-19 14:26:30,044 INFO L78 Accepts]: Start accepts. Automaton has 16922 states and 27143 transitions. Word has length 139 [2021-11-19 14:26:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:30,044 INFO L470 AbstractCegarLoop]: Abstraction has 16922 states and 27143 transitions. [2021-11-19 14:26:30,045 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 14:26:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 16922 states and 27143 transitions. [2021-11-19 14:26:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:26:30,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:30,050 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 14:26:30,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 14:26:30,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:30,269 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:30,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2077570252, now seen corresponding path program 1 times [2021-11-19 14:26:30,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:30,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475418874] [2021-11-19 14:26:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:30,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:30,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:30,272 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:30,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:26:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:26:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:30,961 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 14:26:30,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:31,588 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 14:26:31,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:31,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475418874] [2021-11-19 14:26:31,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475418874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:31,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:31,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:26:31,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703504715] [2021-11-19 14:26:31,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:31,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:26:31,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:31,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:26:31,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:31,591 INFO L87 Difference]: Start difference. First operand 16922 states and 27143 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 14:26:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:32,698 INFO L93 Difference]: Finished difference Result 33034 states and 53384 transitions. [2021-11-19 14:26:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:26:32,699 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 14:26:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:32,809 INFO L225 Difference]: With dead ends: 33034 [2021-11-19 14:26:32,809 INFO L226 Difference]: Without dead ends: 16950 [2021-11-19 14:26:32,905 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 14:26:32,906 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 639 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:32,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 2980 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:26:32,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16950 states. [2021-11-19 14:26:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16950 to 16930. [2021-11-19 14:26:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16930 states, 12808 states have (on average 1.5220174890693317) internal successors, (19494), 13399 states have internal predecessors, (19494), 3120 states have call successors, (3120), 885 states have call predecessors, (3120), 1001 states have return successors, (4275), 3129 states have call predecessors, (4275), 3090 states have call successors, (4275) [2021-11-19 14:26:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16930 states to 16930 states and 26889 transitions. [2021-11-19 14:26:34,447 INFO L78 Accepts]: Start accepts. Automaton has 16930 states and 26889 transitions. Word has length 146 [2021-11-19 14:26:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:34,447 INFO L470 AbstractCegarLoop]: Abstraction has 16930 states and 26889 transitions. [2021-11-19 14:26:34,448 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 14:26:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 16930 states and 26889 transitions. [2021-11-19 14:26:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:26:34,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:34,454 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 14:26:34,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:34,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:34,674 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1747941916, now seen corresponding path program 1 times [2021-11-19 14:26:34,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:34,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440909723] [2021-11-19 14:26:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:34,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:34,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:34,678 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:26:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:35,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:26:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:35,446 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 14:26:35,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:35,855 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 14:26:35,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:35,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440909723] [2021-11-19 14:26:35,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440909723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:35,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:35,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 14:26:35,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433263945] [2021-11-19 14:26:35,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:35,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:35,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:26:35,859 INFO L87 Difference]: Start difference. First operand 16930 states and 26889 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 14:26:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:37,691 INFO L93 Difference]: Finished difference Result 31356 states and 50338 transitions. [2021-11-19 14:26:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:26:37,693 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 14:26:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:37,805 INFO L225 Difference]: With dead ends: 31356 [2021-11-19 14:26:37,806 INFO L226 Difference]: Without dead ends: 17202 [2021-11-19 14:26:37,880 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 14:26:37,881 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 1357 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3262 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:37,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 3262 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:26:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17202 states. [2021-11-19 14:26:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17202 to 17080. [2021-11-19 14:26:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17080 states, 12892 states have (on average 1.5186161960905988) internal successors, (19578), 13525 states have internal predecessors, (19578), 3168 states have call successors, (3168), 909 states have call predecessors, (3168), 1019 states have return successors, (4443), 3129 states have call predecessors, (4443), 3138 states have call successors, (4443) [2021-11-19 14:26:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17080 states to 17080 states and 27189 transitions. [2021-11-19 14:26:39,246 INFO L78 Accepts]: Start accepts. Automaton has 17080 states and 27189 transitions. Word has length 151 [2021-11-19 14:26:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:39,247 INFO L470 AbstractCegarLoop]: Abstraction has 17080 states and 27189 transitions. [2021-11-19 14:26:39,248 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 14:26:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17080 states and 27189 transitions. [2021-11-19 14:26:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:26:39,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:39,255 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 14:26:39,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:39,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:39,470 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash -374853964, now seen corresponding path program 1 times [2021-11-19 14:26:39,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:39,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663321291] [2021-11-19 14:26:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:39,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:39,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:39,473 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:39,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:26:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:26:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:40,355 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 14:26:40,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:41,237 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 14:26:41,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:41,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663321291] [2021-11-19 14:26:41,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663321291] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:41,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:26:41,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:26:41,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654198779] [2021-11-19 14:26:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:41,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:26:41,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:26:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:26:41,241 INFO L87 Difference]: Start difference. First operand 17080 states and 27189 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 14:26:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:46,557 INFO L93 Difference]: Finished difference Result 34635 states and 55656 transitions. [2021-11-19 14:26:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:26:46,559 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 14:26:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:46,690 INFO L225 Difference]: With dead ends: 34635 [2021-11-19 14:26:46,690 INFO L226 Difference]: Without dead ends: 20323 [2021-11-19 14:26:46,766 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 14:26:46,767 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 1994 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 2632 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2081 SdHoareTripleChecker+Valid, 2536 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:46,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2081 Valid, 2536 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2632 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 14:26:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20323 states. [2021-11-19 14:26:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20323 to 18835. [2021-11-19 14:26:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 14286 states have (on average 1.508679826403472) internal successors, (21553), 14941 states have internal predecessors, (21553), 3376 states have call successors, (3376), 1027 states have call predecessors, (3376), 1172 states have return successors, (4781), 3326 states have call predecessors, (4781), 3349 states have call successors, (4781) [2021-11-19 14:26:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 29710 transitions. [2021-11-19 14:26:48,638 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 29710 transitions. Word has length 156 [2021-11-19 14:26:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:48,639 INFO L470 AbstractCegarLoop]: Abstraction has 18835 states and 29710 transitions. [2021-11-19 14:26:48,639 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 14:26:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 29710 transitions. [2021-11-19 14:26:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:26:48,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:48,645 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 14:26:48,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:48,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:48,864 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash 304113656, now seen corresponding path program 1 times [2021-11-19 14:26:48,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:48,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159568776] [2021-11-19 14:26:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:48,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:48,866 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:48,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:26:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:26:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:49,574 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 14:26:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:50,172 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 14:26:50,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:50,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159568776] [2021-11-19 14:26:50,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159568776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:50,172 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:50,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-19 14:26:50,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667949658] [2021-11-19 14:26:50,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:50,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:26:50,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:26:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:26:50,174 INFO L87 Difference]: Start difference. First operand 18835 states and 29710 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 14:26:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:56,972 INFO L93 Difference]: Finished difference Result 37520 states and 59716 transitions. [2021-11-19 14:26:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:26:56,973 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 14:26:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:57,050 INFO L225 Difference]: With dead ends: 37520 [2021-11-19 14:26:57,050 INFO L226 Difference]: Without dead ends: 9747 [2021-11-19 14:26:57,188 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 14:26:57,189 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1889 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 5362 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 5883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 5362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:57,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 3469 Invalid, 5883 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [521 Valid, 5362 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 14:26:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2021-11-19 14:26:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 9654. [2021-11-19 14:26:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9654 states, 7509 states have (on average 1.5181781861765882) internal successors, (11400), 7807 states have internal predecessors, (11400), 1527 states have call successors, (1527), 572 states have call predecessors, (1527), 617 states have return successors, (2067), 1476 states have call predecessors, (2067), 1518 states have call successors, (2067) [2021-11-19 14:26:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9654 states to 9654 states and 14994 transitions. [2021-11-19 14:26:58,017 INFO L78 Accepts]: Start accepts. Automaton has 9654 states and 14994 transitions. Word has length 156 [2021-11-19 14:26:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:58,018 INFO L470 AbstractCegarLoop]: Abstraction has 9654 states and 14994 transitions. [2021-11-19 14:26:58,018 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 14:26:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9654 states and 14994 transitions. [2021-11-19 14:26:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-19 14:26:58,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:58,061 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, 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] [2021-11-19 14:26:58,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:58,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:58,289 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash 596756140, now seen corresponding path program 1 times [2021-11-19 14:26:58,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:58,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100513937] [2021-11-19 14:26:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:58,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:58,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:58,295 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:58,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:26:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:26:58,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2021-11-19 14:26:59,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2021-11-19 14:27:00,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:00,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100513937] [2021-11-19 14:27:00,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100513937] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:00,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 14:27:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152942593] [2021-11-19 14:27:00,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:00,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:27:00,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:27:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:00,906 INFO L87 Difference]: Start difference. First operand 9654 states and 14994 transitions. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 5 states have internal predecessors, (188), 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 14:27:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:01,382 INFO L93 Difference]: Finished difference Result 19146 states and 30221 transitions. [2021-11-19 14:27:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:27:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 5 states have internal predecessors, (188), 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 488 [2021-11-19 14:27:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:01,553 INFO L225 Difference]: With dead ends: 19146 [2021-11-19 14:27:01,553 INFO L226 Difference]: Without dead ends: 10312 [2021-11-19 14:27:01,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 970 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 14:27:01,577 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 70 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 4085 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 14:27:01,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 4085 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:27:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10312 states. [2021-11-19 14:27:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10312 to 9734. [2021-11-19 14:27:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 7573 states have (on average 1.5137990228443152) internal successors, (11464), 7871 states have internal predecessors, (11464), 1527 states have call successors, (1527), 572 states have call predecessors, (1527), 633 states have return successors, (2093), 1492 states have call predecessors, (2093), 1518 states have call successors, (2093) [2021-11-19 14:27:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 15084 transitions. [2021-11-19 14:27:02,239 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 15084 transitions. Word has length 488 [2021-11-19 14:27:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:02,241 INFO L470 AbstractCegarLoop]: Abstraction has 9734 states and 15084 transitions. [2021-11-19 14:27:02,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 5 states have internal predecessors, (188), 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 14:27:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 15084 transitions. [2021-11-19 14:27:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-19 14:27:02,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:02,423 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:02,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:02,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:02,624 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1607483973, now seen corresponding path program 1 times [2021-11-19 14:27:02,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:02,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213556925] [2021-11-19 14:27:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:02,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:02,628 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:02,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:27:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:27:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 581 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-19 14:27:04,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 35 proven. 70 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2021-11-19 14:27:05,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:05,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213556925] [2021-11-19 14:27:05,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213556925] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:05,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:05,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 14:27:05,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001685264] [2021-11-19 14:27:05,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:05,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:27:05,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:27:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:27:05,501 INFO L87 Difference]: Start difference. First operand 9734 states and 15084 transitions. Second operand has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-19 14:27:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:10,630 INFO L93 Difference]: Finished difference Result 28032 states and 44284 transitions. [2021-11-19 14:27:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:27:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 507 [2021-11-19 14:27:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:10,703 INFO L225 Difference]: With dead ends: 28032 [2021-11-19 14:27:10,703 INFO L226 Difference]: Without dead ends: 18154 [2021-11-19 14:27:10,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 1005 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 14:27:10,737 INFO L933 BasicCegarLoop]: 1284 mSDtfsCounter, 3008 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 3437 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3172 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 4253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 3437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:10,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3172 Valid, 2187 Invalid, 4253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 3437 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 14:27:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18154 states. [2021-11-19 14:27:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18154 to 17331. [2021-11-19 14:27:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17331 states, 13272 states have (on average 1.5067811934900543) internal successors, (19998), 13849 states have internal predecessors, (19998), 2859 states have call successors, (2859), 1092 states have call predecessors, (2859), 1199 states have return successors, (4152), 2769 states have call predecessors, (4152), 2846 states have call successors, (4152) [2021-11-19 14:27:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17331 states to 17331 states and 27009 transitions. [2021-11-19 14:27:11,965 INFO L78 Accepts]: Start accepts. Automaton has 17331 states and 27009 transitions. Word has length 507 [2021-11-19 14:27:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:11,966 INFO L470 AbstractCegarLoop]: Abstraction has 17331 states and 27009 transitions. [2021-11-19 14:27:11,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-19 14:27:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 17331 states and 27009 transitions. [2021-11-19 14:27:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-19 14:27:11,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:11,999 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:12,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:12,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:12,202 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash -877786773, now seen corresponding path program 1 times [2021-11-19 14:27:12,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:12,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440691298] [2021-11-19 14:27:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:12,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:12,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:12,205 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:12,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:27:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:27:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 717 proven. 27 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-19 14:27:14,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:27:15,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:15,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440691298] [2021-11-19 14:27:15,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440691298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:15,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987704383] [2021-11-19 14:27:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:15,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:27:15,633 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:27:15,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 14:27:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:27:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-19 14:27:17,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2021-11-19 14:27:18,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [987704383] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:18,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:27:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-19 14:27:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842026340] [2021-11-19 14:27:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:18,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:27:18,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:27:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:27:18,448 INFO L87 Difference]: Start difference. First operand 17331 states and 27009 transitions. Second operand has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 14:27:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:21,651 INFO L93 Difference]: Finished difference Result 48799 states and 78114 transitions. [2021-11-19 14:27:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:27:21,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 484 [2021-11-19 14:27:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:21,893 INFO L225 Difference]: With dead ends: 48799 [2021-11-19 14:27:21,893 INFO L226 Difference]: Without dead ends: 31048 [2021-11-19 14:27:22,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1944 GetRequests, 1912 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 14:27:22,023 INFO L933 BasicCegarLoop]: 1346 mSDtfsCounter, 774 mSDsluCounter, 8479 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 9825 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:22,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 9825 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:27:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31048 states. [2021-11-19 14:27:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31048 to 30530. [2021-11-19 14:27:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30530 states, 23205 states have (on average 1.5111829347123464) internal successors, (35067), 24282 states have internal predecessors, (35067), 5262 states have call successors, (5262), 1930 states have call predecessors, (5262), 2062 states have return successors, (7715), 5077 states have call predecessors, (7715), 5239 states have call successors, (7715) [2021-11-19 14:27:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30530 states to 30530 states and 48044 transitions. [2021-11-19 14:27:24,461 INFO L78 Accepts]: Start accepts. Automaton has 30530 states and 48044 transitions. Word has length 484 [2021-11-19 14:27:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:24,462 INFO L470 AbstractCegarLoop]: Abstraction has 30530 states and 48044 transitions. [2021-11-19 14:27:24,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 14:27:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 30530 states and 48044 transitions. [2021-11-19 14:27:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-19 14:27:24,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:24,516 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:24,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:24,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:24,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:24,921 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash 113414583, now seen corresponding path program 1 times [2021-11-19 14:27:24,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:24,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985668228] [2021-11-19 14:27:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:24,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:24,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:24,923 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:27:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1759 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:27:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 754 proven. 12 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-11-19 14:27:26,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 71 proven. 107 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-19 14:27:28,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:28,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985668228] [2021-11-19 14:27:28,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985668228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:28,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1344659626] [2021-11-19 14:27:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:28,334 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:28,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:27:28,335 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:27:28,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 14:27:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:28,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1759 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:27:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-19 14:27:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-19 14:27:31,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1344659626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:31,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068103652] [2021-11-19 14:27:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:31,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:31,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:27:31,623 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:27:31,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 14:27:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1759 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:27:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-19 14:27:33,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-19 14:27:34,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068103652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:34,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:27:34,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-19 14:27:34,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005393921] [2021-11-19 14:27:34,528 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:27:34,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 14:27:34,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:34,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 14:27:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:27:34,532 INFO L87 Difference]: Start difference. First operand 30530 states and 48044 transitions. Second operand has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 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 14:28:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:10,547 INFO L93 Difference]: Finished difference Result 87654 states and 143510 transitions. [2021-11-19 14:28:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-19 14:28:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) Word has length 486 [2021-11-19 14:28:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:11,055 INFO L225 Difference]: With dead ends: 87654 [2021-11-19 14:28:11,055 INFO L226 Difference]: Without dead ends: 56938 [2021-11-19 14:28:11,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3005 GetRequests, 2920 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 14:28:11,295 INFO L933 BasicCegarLoop]: 2094 mSDtfsCounter, 13413 mSDsluCounter, 7902 mSDsCounter, 0 mSdLazyCounter, 26209 mSolverCounterSat, 5929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13413 SdHoareTripleChecker+Valid, 9996 SdHoareTripleChecker+Invalid, 32138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5929 IncrementalHoareTripleChecker+Valid, 26209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:11,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13413 Valid, 9996 Invalid, 32138 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5929 Valid, 26209 Invalid, 0 Unknown, 0 Unchecked, 28.7s Time] [2021-11-19 14:28:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56938 states. [2021-11-19 14:28:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56938 to 44797. [2021-11-19 14:28:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44797 states, 33734 states have (on average 1.4671844429951977) internal successors, (49494), 35247 states have internal predecessors, (49494), 7682 states have call successors, (7682), 3197 states have call predecessors, (7682), 3380 states have return successors, (11912), 7309 states have call predecessors, (11912), 7658 states have call successors, (11912) [2021-11-19 14:28:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44797 states to 44797 states and 69088 transitions. [2021-11-19 14:28:15,157 INFO L78 Accepts]: Start accepts. Automaton has 44797 states and 69088 transitions. Word has length 486 [2021-11-19 14:28:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 44797 states and 69088 transitions. [2021-11-19 14:28:15,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 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 14:28:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 44797 states and 69088 transitions. [2021-11-19 14:28:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-19 14:28:15,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:15,184 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 14:28:15,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:15,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:15,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:15,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:15,786 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash 335821445, now seen corresponding path program 1 times [2021-11-19 14:28:15,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:15,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775095685] [2021-11-19 14:28:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:15,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:15,789 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:15,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab388ece-3704-49ba-8ceb-b0901d14c55c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:28:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:28:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:17,229 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 14:28:17,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:18,398 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 14:28:18,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:18,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775095685] [2021-11-19 14:28:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775095685] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:28:18,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:28:18,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:28:18,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607332708] [2021-11-19 14:28:18,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:18,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:28:18,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:28:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:28:18,401 INFO L87 Difference]: Start difference. First operand 44797 states and 69088 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 14:28:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:22,122 INFO L93 Difference]: Finished difference Result 87851 states and 137089 transitions. [2021-11-19 14:28:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:22,123 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 14:28:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:22,362 INFO L225 Difference]: With dead ends: 87851 [2021-11-19 14:28:22,362 INFO L226 Difference]: Without dead ends: 45851 [2021-11-19 14:28:22,545 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 14:28:22,546 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 101 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2208 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 14:28:22,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2208 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:28:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states.