./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/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_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/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_589f7acd-49a0-4954-9a6a-8610be0173df/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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:43:00,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:43:00,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:43:00,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:43:00,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:43:00,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:43:00,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:43:00,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:43:00,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:43:00,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:43:00,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:43:00,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:43:00,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:43:00,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:43:00,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:43:00,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:43:00,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:43:00,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:43:00,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:43:00,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:43:00,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:43:00,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:43:00,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:43:00,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:43:00,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:43:00,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:43:00,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:43:00,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:43:00,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:43:00,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:43:00,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:43:00,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:43:00,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:43:00,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:43:00,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:43:00,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:43:00,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:43:00,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:43:00,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:43:00,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:43:00,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:43:00,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:43:00,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:43:00,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:43:00,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:43:00,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:43:00,892 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:43:00,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:43:00,893 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:43:00,893 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:43:00,893 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:43:00,894 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:43:00,895 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:43:00,895 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:43:00,895 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:43:00,896 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:43:00,896 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:43:00,896 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:43:00,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:43:00,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:43:00,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:43:00,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:43:00,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:43:00,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:43:00,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:43:00,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:43:00,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:43:00,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:43:00,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:43:00,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:43:00,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:43:00,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:43:00,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:43:00,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:00,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:43:00,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:43:00,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:43:00,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:43:00,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:43:00,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:43:00,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:43:00,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:43:00,905 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_589f7acd-49a0-4954-9a6a-8610be0173df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-19 15:43:01,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:43:01,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:43:01,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:43:01,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:43:01,331 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:43:01,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-19 15:43:01,418 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/e0ecea741/527c39a2086546478fa7b6aff4a4bb4a/FLAG050e625a6 [2021-11-19 15:43:02,202 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:43:02,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-19 15:43:02,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/e0ecea741/527c39a2086546478fa7b6aff4a4bb4a/FLAG050e625a6 [2021-11-19 15:43:02,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/e0ecea741/527c39a2086546478fa7b6aff4a4bb4a [2021-11-19 15:43:02,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:43:02,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:43:02,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:02,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:43:02,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:43:02,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:02" (1/1) ... [2021-11-19 15:43:02,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d6755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:02, skipping insertion in model container [2021-11-19 15:43:02,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:02" (1/1) ... [2021-11-19 15:43:02,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:43:02,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:03,126 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_589f7acd-49a0-4954-9a6a-8610be0173df/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-19 15:43:03,134 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:03,154 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:43:03,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d2432e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:03, skipping insertion in model container [2021-11-19 15:43:03,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:03,156 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:43:03,159 INFO L158 Benchmark]: Toolchain (without parser) took 785.34ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 54.9MB in the beginning and 72.4MB in the end (delta: -17.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 15:43:03,161 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:43:03,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 767.93ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 54.7MB in the beginning and 72.4MB in the end (delta: -17.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 15:43:03,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 767.93ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 54.7MB in the beginning and 72.4MB in the end (delta: -17.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1375]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/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_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/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_589f7acd-49a0-4954-9a6a-8610be0173df/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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:43:05,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:43:05,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:43:05,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:43:05,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:43:05,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:43:05,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:43:05,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:43:05,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:43:05,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:43:05,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:43:05,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:43:05,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:43:05,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:43:05,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:43:05,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:43:05,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:43:05,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:43:05,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:43:05,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:43:05,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:43:05,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:43:05,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:43:05,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:43:05,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:43:05,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:43:05,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:43:05,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:43:05,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:43:05,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:43:05,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:43:05,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:43:05,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:43:05,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:43:05,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:43:05,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:43:05,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:43:05,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:43:05,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:43:05,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:43:05,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:43:05,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:43:05,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:43:05,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:43:05,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:43:05,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:43:05,935 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:43:05,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:43:05,936 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:43:05,936 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:43:05,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:43:05,937 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:43:05,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:43:05,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:43:05,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:43:05,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:43:05,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:43:05,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:43:05,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:43:05,939 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:43:05,940 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:43:05,940 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:43:05,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:43:05,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:43:05,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:43:05,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:43:05,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:43:05,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:43:05,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:43:05,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:05,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:43:05,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:43:05,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:43:05,943 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:43:05,943 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:43:05,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:43:05,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:43:05,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:43:05,944 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_589f7acd-49a0-4954-9a6a-8610be0173df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-19 15:43:06,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:43:06,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:43:06,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:43:06,370 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:43:06,370 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:43:06,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-19 15:43:06,447 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/e2855150e/dfeac013131d40b4b8b34070ff0dba05/FLAG0690a259e [2021-11-19 15:43:07,218 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:43:07,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-19 15:43:07,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/e2855150e/dfeac013131d40b4b8b34070ff0dba05/FLAG0690a259e [2021-11-19 15:43:07,353 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/data/e2855150e/dfeac013131d40b4b8b34070ff0dba05 [2021-11-19 15:43:07,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:43:07,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:43:07,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:07,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:43:07,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:43:07,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:07" (1/1) ... [2021-11-19 15:43:07,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69015393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:07, skipping insertion in model container [2021-11-19 15:43:07,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:07" (1/1) ... [2021-11-19 15:43:07,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:43:07,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:08,331 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_589f7acd-49a0-4954-9a6a-8610be0173df/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-19 15:43:08,336 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:08,359 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:43:08,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:08,612 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_589f7acd-49a0-4954-9a6a-8610be0173df/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-19 15:43:08,613 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:08,620 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:43:08,762 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_589f7acd-49a0-4954-9a6a-8610be0173df/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-19 15:43:08,762 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:08,826 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:43:08,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08 WrapperNode [2021-11-19 15:43:08,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:08,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:43:08,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:43:08,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:43:08,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:08,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:08,980 INFO L137 Inliner]: procedures = 91, calls = 329, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 947 [2021-11-19 15:43:08,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:43:08,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:43:08,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:43:08,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:43:08,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:08,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:43:09,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:43:09,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:43:09,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:43:09,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (1/1) ... [2021-11-19 15:43:09,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:43:09,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:43:09,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:43:09,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:43:09,230 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:43:09,231 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:43:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:43:09,231 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:43:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 15:43:09,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 15:43:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:43:09,232 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:43:09,232 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 15:43:09,232 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 15:43:09,232 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:43:09,233 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:43:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:43:09,233 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:43:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:43:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:43:09,234 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:43:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:43:09,234 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:43:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:43:09,234 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:43:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:43:09,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:43:09,235 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 15:43:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 15:43:09,235 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:43:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:43:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:43:09,236 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:43:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:43:09,236 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:43:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:43:09,237 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:43:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:43:09,237 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:43:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-19 15:43:09,238 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-19 15:43:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:43:09,238 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:43:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:43:09,238 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:43:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:43:09,239 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:43:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:43:09,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:43:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:43:09,240 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:43:09,495 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:43:09,512 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:43:11,066 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:43:11,085 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:43:11,085 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:43:11,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:11 BoogieIcfgContainer [2021-11-19 15:43:11,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:43:11,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:43:11,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:43:11,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:43:11,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:43:07" (1/3) ... [2021-11-19 15:43:11,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1608b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:43:11, skipping insertion in model container [2021-11-19 15:43:11,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:08" (2/3) ... [2021-11-19 15:43:11,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1608b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:43:11, skipping insertion in model container [2021-11-19 15:43:11,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:11" (3/3) ... [2021-11-19 15:43:11,099 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2021-11-19 15:43:11,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:43:11,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:43:11,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:43:11,196 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:43:11,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:43:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 402 states have (on average 1.681592039800995) internal successors, (676), 418 states have internal predecessors, (676), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:43:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 15:43:11,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:11,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:11,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1965651267, now seen corresponding path program 1 times [2021-11-19 15:43:11,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:11,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315262547] [2021-11-19 15:43:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:11,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:11,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:11,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:43:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:43:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:12,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:12,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:12,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315262547] [2021-11-19 15:43:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315262547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:12,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:12,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:43:12,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165232710] [2021-11-19 15:43:12,407 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:12,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:43:12,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:12,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:43:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:43:12,448 INFO L87 Difference]: Start difference. First operand has 517 states, 402 states have (on average 1.681592039800995) internal successors, (676), 418 states have internal predecessors, (676), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 15:43:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:12,738 INFO L93 Difference]: Finished difference Result 1029 states and 1718 transitions. [2021-11-19 15:43:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 101 [2021-11-19 15:43:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:12,761 INFO L225 Difference]: With dead ends: 1029 [2021-11-19 15:43:12,762 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 15:43:12,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:43:12,782 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 17 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:12,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3350 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:43:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 15:43:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-19 15:43:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.6582914572864322) internal successors, (660), 413 states have internal predecessors, (660), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:43:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 841 transitions. [2021-11-19 15:43:12,890 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 841 transitions. Word has length 101 [2021-11-19 15:43:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:12,891 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 841 transitions. [2021-11-19 15:43:12,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 15:43:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 841 transitions. [2021-11-19 15:43:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 15:43:12,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:12,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:12,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:13,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:13,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1946474889, now seen corresponding path program 1 times [2021-11-19 15:43:13,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:13,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877832060] [2021-11-19 15:43:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:13,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:13,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:13,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:43:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:43:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:13,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:14,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:14,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877832060] [2021-11-19 15:43:14,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877832060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:14,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:14,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:43:14,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032322387] [2021-11-19 15:43:14,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:14,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:43:14,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:14,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:43:14,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:43:14,217 INFO L87 Difference]: Start difference. First operand 512 states and 841 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 15:43:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:14,488 INFO L93 Difference]: Finished difference Result 1012 states and 1674 transitions. [2021-11-19 15:43:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:43:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-19 15:43:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:14,499 INFO L225 Difference]: With dead ends: 1012 [2021-11-19 15:43:14,499 INFO L226 Difference]: Without dead ends: 521 [2021-11-19 15:43:14,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:43:14,506 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 118 mSDsluCounter, 5600 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6425 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:14,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6425 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:43:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-19 15:43:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2021-11-19 15:43:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 406 states have (on average 1.6576354679802956) internal successors, (673), 422 states have internal predecessors, (673), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-19 15:43:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 855 transitions. [2021-11-19 15:43:14,584 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 855 transitions. Word has length 106 [2021-11-19 15:43:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:14,585 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 855 transitions. [2021-11-19 15:43:14,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 15:43:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 855 transitions. [2021-11-19 15:43:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 15:43:14,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:14,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:14,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:14,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:14,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash 135549763, now seen corresponding path program 1 times [2021-11-19 15:43:14,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:14,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324473643] [2021-11-19 15:43:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:14,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:14,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:14,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:43:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:43:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:15,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:15,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:15,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324473643] [2021-11-19 15:43:15,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324473643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:15,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:15,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:43:15,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828542122] [2021-11-19 15:43:15,690 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:15,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:43:15,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:43:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:43:15,694 INFO L87 Difference]: Start difference. First operand 521 states and 855 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 15:43:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:15,948 INFO L93 Difference]: Finished difference Result 1068 states and 1765 transitions. [2021-11-19 15:43:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 107 [2021-11-19 15:43:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:15,955 INFO L225 Difference]: With dead ends: 1068 [2021-11-19 15:43:15,955 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 15:43:15,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:43:15,961 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 230 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:15,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2332 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:43:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 15:43:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 526. [2021-11-19 15:43:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 411 states have (on average 1.5961070559610706) internal successors, (656), 426 states have internal predecessors, (656), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:43:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 837 transitions. [2021-11-19 15:43:15,996 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 837 transitions. Word has length 107 [2021-11-19 15:43:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:15,996 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 837 transitions. [2021-11-19 15:43:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 15:43:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 837 transitions. [2021-11-19 15:43:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 15:43:16,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:16,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:16,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:16,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:16,220 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1956894120, now seen corresponding path program 1 times [2021-11-19 15:43:16,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:16,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455551360] [2021-11-19 15:43:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:16,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:16,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:16,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:16,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:43:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:16,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:43:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:17,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:17,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455551360] [2021-11-19 15:43:17,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455551360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:17,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:17,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:43:17,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535356657] [2021-11-19 15:43:17,120 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:17,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:43:17,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:43:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:43:17,122 INFO L87 Difference]: Start difference. First operand 526 states and 837 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:43:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:17,277 INFO L93 Difference]: Finished difference Result 1010 states and 1628 transitions. [2021-11-19 15:43:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:43:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 109 [2021-11-19 15:43:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:17,285 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 15:43:17,285 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 15:43:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:17,290 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 137 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3987 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:17,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 3987 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:43:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 15:43:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 505. [2021-11-19 15:43:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 390 states have (on average 1.6102564102564103) internal successors, (628), 405 states have internal predecessors, (628), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:43:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 809 transitions. [2021-11-19 15:43:17,343 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 809 transitions. Word has length 109 [2021-11-19 15:43:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:17,343 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 809 transitions. [2021-11-19 15:43:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:43:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 809 transitions. [2021-11-19 15:43:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 15:43:17,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:17,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:17,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:17,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:17,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash -85513482, now seen corresponding path program 1 times [2021-11-19 15:43:17,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:17,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614527013] [2021-11-19 15:43:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:17,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:17,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:17,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:43:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:17,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:43:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:18,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:43:18,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:18,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614527013] [2021-11-19 15:43:18,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614527013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:18,683 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:18,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:43:18,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057918394] [2021-11-19 15:43:18,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:18,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:43:18,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:18,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:43:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:43:18,686 INFO L87 Difference]: Start difference. First operand 505 states and 809 transitions. Second operand has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 15:43:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:19,010 INFO L93 Difference]: Finished difference Result 979 states and 1583 transitions. [2021-11-19 15:43:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:43:19,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 112 [2021-11-19 15:43:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:19,018 INFO L225 Difference]: With dead ends: 979 [2021-11-19 15:43:19,018 INFO L226 Difference]: Without dead ends: 510 [2021-11-19 15:43:19,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:43:19,023 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 46 mSDsluCounter, 6090 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6856 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:19,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 6856 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:43:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-19 15:43:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 507. [2021-11-19 15:43:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 392 states have (on average 1.6045918367346939) internal successors, (629), 407 states have internal predecessors, (629), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-19 15:43:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 810 transitions. [2021-11-19 15:43:19,054 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 810 transitions. Word has length 112 [2021-11-19 15:43:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 810 transitions. [2021-11-19 15:43:19,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 15:43:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 810 transitions. [2021-11-19 15:43:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:43:19,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:19,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:19,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:19,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:19,277 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1135066562, now seen corresponding path program 1 times [2021-11-19 15:43:19,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:19,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799355908] [2021-11-19 15:43:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:19,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:19,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:19,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:19,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:43:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:19,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:43:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:43:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:43:20,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:20,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799355908] [2021-11-19 15:43:20,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799355908] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:20,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:20,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:43:20,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303526979] [2021-11-19 15:43:20,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:20,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:43:20,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:20,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:43:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:20,307 INFO L87 Difference]: Start difference. First operand 507 states and 810 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:21,230 INFO L93 Difference]: Finished difference Result 975 states and 1601 transitions. [2021-11-19 15:43:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:21,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-19 15:43:21,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:21,237 INFO L225 Difference]: With dead ends: 975 [2021-11-19 15:43:21,237 INFO L226 Difference]: Without dead ends: 511 [2021-11-19 15:43:21,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:43:21,243 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 730 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:21,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1941 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:43:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-19 15:43:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2021-11-19 15:43:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 395 states have (on average 1.6) internal successors, (632), 410 states have internal predecessors, (632), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-19 15:43:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 814 transitions. [2021-11-19 15:43:21,301 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 814 transitions. Word has length 113 [2021-11-19 15:43:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:21,303 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 814 transitions. [2021-11-19 15:43:21,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 814 transitions. [2021-11-19 15:43:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 15:43:21,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:21,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:21,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:21,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:21,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2061669059, now seen corresponding path program 1 times [2021-11-19 15:43:21,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:21,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709905526] [2021-11-19 15:43:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:21,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:21,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:21,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:43:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:21,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:43:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:43:22,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:43:22,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:22,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709905526] [2021-11-19 15:43:22,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709905526] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:22,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:22,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:43:22,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281177839] [2021-11-19 15:43:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:22,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:43:22,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:43:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:22,543 INFO L87 Difference]: Start difference. First operand 511 states and 814 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:23,381 INFO L93 Difference]: Finished difference Result 984 states and 1608 transitions. [2021-11-19 15:43:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-19 15:43:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:23,387 INFO L225 Difference]: With dead ends: 984 [2021-11-19 15:43:23,387 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 15:43:23,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:43:23,393 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 730 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:23,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1942 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:43:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 15:43:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 15:43:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 399 states have (on average 1.593984962406015) internal successors, (636), 414 states have internal predecessors, (636), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-19 15:43:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 819 transitions. [2021-11-19 15:43:23,423 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 819 transitions. Word has length 116 [2021-11-19 15:43:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:23,424 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 819 transitions. [2021-11-19 15:43:23,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 819 transitions. [2021-11-19 15:43:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 15:43:23,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:23,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:23,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:23,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:23,644 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -427684002, now seen corresponding path program 1 times [2021-11-19 15:43:23,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:23,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246629660] [2021-11-19 15:43:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:23,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:23,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:23,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:23,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:43:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:43:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:43:24,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:43:24,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:24,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246629660] [2021-11-19 15:43:24,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246629660] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:24,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:24,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:43:24,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657002968] [2021-11-19 15:43:24,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:24,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:43:24,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:43:24,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:24,657 INFO L87 Difference]: Start difference. First operand 516 states and 819 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:25,423 INFO L93 Difference]: Finished difference Result 995 states and 1617 transitions. [2021-11-19 15:43:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-11-19 15:43:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:25,430 INFO L225 Difference]: With dead ends: 995 [2021-11-19 15:43:25,430 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 15:43:25,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:43:25,446 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 728 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:25,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1942 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:43:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 15:43:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-19 15:43:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 404 states have (on average 1.5866336633663367) internal successors, (641), 419 states have internal predecessors, (641), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (93), 88 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-19 15:43:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 825 transitions. [2021-11-19 15:43:25,484 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 825 transitions. Word has length 119 [2021-11-19 15:43:25,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:25,484 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 825 transitions. [2021-11-19 15:43:25,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 825 transitions. [2021-11-19 15:43:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 15:43:25,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:25,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:25,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:25,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:25,704 INFO L85 PathProgramCache]: Analyzing trace with hash -33723247, now seen corresponding path program 1 times [2021-11-19 15:43:25,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:25,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806674508] [2021-11-19 15:43:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:25,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:25,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:25,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:43:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:43:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:43:26,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:43:26,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:26,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806674508] [2021-11-19 15:43:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806674508] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:26,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:26,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:43:26,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897442985] [2021-11-19 15:43:26,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:43:26,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:43:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:26,670 INFO L87 Difference]: Start difference. First operand 522 states and 825 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:27,470 INFO L93 Difference]: Finished difference Result 1008 states and 1628 transitions. [2021-11-19 15:43:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2021-11-19 15:43:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:27,474 INFO L225 Difference]: With dead ends: 1008 [2021-11-19 15:43:27,474 INFO L226 Difference]: Without dead ends: 529 [2021-11-19 15:43:27,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:43:27,480 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 729 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:27,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1942 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:43:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-19 15:43:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-19 15:43:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 410 states have (on average 1.578048780487805) internal successors, (647), 425 states have internal predecessors, (647), 91 states have call successors, (91), 28 states have call predecessors, (91), 27 states have return successors, (94), 88 states have call predecessors, (94), 90 states have call successors, (94) [2021-11-19 15:43:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 832 transitions. [2021-11-19 15:43:27,523 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 832 transitions. Word has length 122 [2021-11-19 15:43:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:27,524 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 832 transitions. [2021-11-19 15:43:27,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:43:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 832 transitions. [2021-11-19 15:43:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:43:27,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:27,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:27,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:27,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -517842182, now seen corresponding path program 1 times [2021-11-19 15:43:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:27,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623117667] [2021-11-19 15:43:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:27,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:27,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:27,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:27,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:43:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:43:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:43:28,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 15:43:28,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:28,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623117667] [2021-11-19 15:43:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623117667] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:28,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:28,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-19 15:43:28,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671801900] [2021-11-19 15:43:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:28,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:43:28,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:43:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:43:28,902 INFO L87 Difference]: Start difference. First operand 529 states and 832 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:43:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:35,809 INFO L93 Difference]: Finished difference Result 1797 states and 2907 transitions. [2021-11-19 15:43:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:43:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2021-11-19 15:43:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:35,823 INFO L225 Difference]: With dead ends: 1797 [2021-11-19 15:43:35,823 INFO L226 Difference]: Without dead ends: 1311 [2021-11-19 15:43:35,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:43:35,830 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 1565 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 5564 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 4798 SdHoareTripleChecker+Invalid, 6180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:35,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 4798 Invalid, 6180 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [616 Valid, 5564 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-19 15:43:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-11-19 15:43:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1089. [2021-11-19 15:43:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 822 states have (on average 1.5827250608272505) internal successors, (1301), 859 states have internal predecessors, (1301), 208 states have call successors, (208), 53 states have call predecessors, (208), 58 states have return successors, (233), 207 states have call predecessors, (233), 206 states have call successors, (233) [2021-11-19 15:43:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1742 transitions. [2021-11-19 15:43:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1742 transitions. Word has length 125 [2021-11-19 15:43:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:35,941 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1742 transitions. [2021-11-19 15:43:35,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:43:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1742 transitions. [2021-11-19 15:43:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 15:43:35,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:35,948 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:35,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:36,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:36,163 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1816075832, now seen corresponding path program 1 times [2021-11-19 15:43:36,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:36,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504161020] [2021-11-19 15:43:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:36,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:36,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:36,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:43:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:36,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:43:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:43:36,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:43:37,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:37,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504161020] [2021-11-19 15:43:37,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504161020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:37,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:37,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 15:43:37,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391097752] [2021-11-19 15:43:37,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:37,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:43:37,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:43:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:43:37,163 INFO L87 Difference]: Start difference. First operand 1089 states and 1742 transitions. Second operand has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:43:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:37,457 INFO L93 Difference]: Finished difference Result 2105 states and 3391 transitions. [2021-11-19 15:43:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:43:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 128 [2021-11-19 15:43:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:37,468 INFO L225 Difference]: With dead ends: 2105 [2021-11-19 15:43:37,468 INFO L226 Difference]: Without dead ends: 1049 [2021-11-19 15:43:37,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:43:37,478 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 85 mSDsluCounter, 4569 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 5335 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:37,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 5335 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:43:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-11-19 15:43:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1046. [2021-11-19 15:43:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 790 states have (on average 1.589873417721519) internal successors, (1256), 826 states have internal predecessors, (1256), 202 states have call successors, (202), 50 states have call predecessors, (202), 53 states have return successors, (220), 200 states have call predecessors, (220), 200 states have call successors, (220) [2021-11-19 15:43:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1678 transitions. [2021-11-19 15:43:37,546 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1678 transitions. Word has length 128 [2021-11-19 15:43:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:37,547 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1678 transitions. [2021-11-19 15:43:37,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:43:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1678 transitions. [2021-11-19 15:43:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:43:37,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:37,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:37,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:37,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:37,769 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1895684408, now seen corresponding path program 1 times [2021-11-19 15:43:37,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:37,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083273842] [2021-11-19 15:43:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:37,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:37,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:37,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:43:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:43:38,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:43:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 15:43:38,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:38,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083273842] [2021-11-19 15:43:38,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083273842] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:38,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:38,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-19 15:43:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983928823] [2021-11-19 15:43:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:43:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:43:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:43:38,897 INFO L87 Difference]: Start difference. First operand 1046 states and 1678 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:43:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:42,622 INFO L93 Difference]: Finished difference Result 2618 states and 4251 transitions. [2021-11-19 15:43:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:43:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2021-11-19 15:43:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:42,638 INFO L225 Difference]: With dead ends: 2618 [2021-11-19 15:43:42,638 INFO L226 Difference]: Without dead ends: 1612 [2021-11-19 15:43:42,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:43:42,648 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 1847 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:42,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1947 Valid, 1869 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 15:43:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-19 15:43:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1571. [2021-11-19 15:43:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1176 states have (on average 1.5935374149659864) internal successors, (1874), 1233 states have internal predecessors, (1874), 313 states have call successors, (313), 72 states have call predecessors, (313), 81 states have return successors, (356), 314 states have call predecessors, (356), 310 states have call successors, (356) [2021-11-19 15:43:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2543 transitions. [2021-11-19 15:43:42,788 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2543 transitions. Word has length 131 [2021-11-19 15:43:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:42,789 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 2543 transitions. [2021-11-19 15:43:42,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:43:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2543 transitions. [2021-11-19 15:43:42,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 15:43:42,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:42,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:42,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:43,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:43,008 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2041019427, now seen corresponding path program 1 times [2021-11-19 15:43:43,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:43,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295212981] [2021-11-19 15:43:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:43,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:43,010 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:43,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:43:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:43:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 15:43:43,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:43:43,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:43,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295212981] [2021-11-19 15:43:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295212981] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:43,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:43,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 15:43:43,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089284256] [2021-11-19 15:43:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:43,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:43:43,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:43:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:43:43,955 INFO L87 Difference]: Start difference. First operand 1571 states and 2543 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:43:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:44,877 INFO L93 Difference]: Finished difference Result 4491 states and 7338 transitions. [2021-11-19 15:43:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:43:44,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2021-11-19 15:43:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:44,902 INFO L225 Difference]: With dead ends: 4491 [2021-11-19 15:43:44,902 INFO L226 Difference]: Without dead ends: 2960 [2021-11-19 15:43:44,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:44,913 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 636 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:44,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 2580 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:43:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-11-19 15:43:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2945. [2021-11-19 15:43:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2186 states have (on average 1.5709057639524244) internal successors, (3434), 2296 states have internal predecessors, (3434), 604 states have call successors, (604), 144 states have call predecessors, (604), 154 states have return successors, (683), 599 states have call predecessors, (683), 598 states have call successors, (683) [2021-11-19 15:43:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4721 transitions. [2021-11-19 15:43:45,133 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4721 transitions. Word has length 132 [2021-11-19 15:43:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:45,133 INFO L470 AbstractCegarLoop]: Abstraction has 2945 states and 4721 transitions. [2021-11-19 15:43:45,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:43:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4721 transitions. [2021-11-19 15:43:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:43:45,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:45,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:45,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:45,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:45,355 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1072544168, now seen corresponding path program 1 times [2021-11-19 15:43:45,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:45,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534630597] [2021-11-19 15:43:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:45,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:45,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:45,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:43:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:43:45,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:43:45,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:43:46,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:46,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534630597] [2021-11-19 15:43:46,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534630597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:46,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:46,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-19 15:43:46,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714134131] [2021-11-19 15:43:46,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:43:46,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:43:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:43:46,323 INFO L87 Difference]: Start difference. First operand 2945 states and 4721 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:43:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:48,112 INFO L93 Difference]: Finished difference Result 8694 states and 14118 transitions. [2021-11-19 15:43:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:43:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 134 [2021-11-19 15:43:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:48,167 INFO L225 Difference]: With dead ends: 8694 [2021-11-19 15:43:48,167 INFO L226 Difference]: Without dead ends: 5789 [2021-11-19 15:43:48,192 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 15:43:48,193 INFO L933 BasicCegarLoop]: 1518 mSDtfsCounter, 1474 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 4448 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:48,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 4448 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 15:43:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5789 states. [2021-11-19 15:43:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5789 to 5763. [2021-11-19 15:43:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 4278 states have (on average 1.5661524076671343) internal successors, (6700), 4497 states have internal predecessors, (6700), 1179 states have call successors, (1179), 285 states have call predecessors, (1179), 305 states have return successors, (1442), 1170 states have call predecessors, (1442), 1167 states have call successors, (1442) [2021-11-19 15:43:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 9321 transitions. [2021-11-19 15:43:48,724 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 9321 transitions. Word has length 134 [2021-11-19 15:43:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 5763 states and 9321 transitions. [2021-11-19 15:43:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:43:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 9321 transitions. [2021-11-19 15:43:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:43:48,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:48,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:48,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:48,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:48,944 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash 708955767, now seen corresponding path program 1 times [2021-11-19 15:43:48,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:48,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220200846] [2021-11-19 15:43:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:48,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:48,946 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:48,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:43:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:43:49,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:43:49,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:43:49,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:49,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220200846] [2021-11-19 15:43:49,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220200846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:49,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:49,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 15:43:49,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212985060] [2021-11-19 15:43:49,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:49,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:43:49,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:43:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:49,699 INFO L87 Difference]: Start difference. First operand 5763 states and 9321 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:43:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:50,082 INFO L93 Difference]: Finished difference Result 10344 states and 16342 transitions. [2021-11-19 15:43:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:43:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 134 [2021-11-19 15:43:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:50,145 INFO L225 Difference]: With dead ends: 10344 [2021-11-19 15:43:50,145 INFO L226 Difference]: Without dead ends: 6637 [2021-11-19 15:43:50,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:50,162 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 507 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:50,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 1304 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:43:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2021-11-19 15:43:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 6611. [2021-11-19 15:43:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6611 states, 4931 states have (on average 1.5238288379639018) internal successors, (7514), 5148 states have internal predecessors, (7514), 1275 states have call successors, (1275), 372 states have call predecessors, (1275), 404 states have return successors, (1627), 1274 states have call predecessors, (1627), 1257 states have call successors, (1627) [2021-11-19 15:43:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6611 states to 6611 states and 10416 transitions. [2021-11-19 15:43:50,738 INFO L78 Accepts]: Start accepts. Automaton has 6611 states and 10416 transitions. Word has length 134 [2021-11-19 15:43:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:50,739 INFO L470 AbstractCegarLoop]: Abstraction has 6611 states and 10416 transitions. [2021-11-19 15:43:50,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:43:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6611 states and 10416 transitions. [2021-11-19 15:43:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:43:50,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:50,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:50,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:50,963 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 507131833, now seen corresponding path program 1 times [2021-11-19 15:43:50,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:50,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715162614] [2021-11-19 15:43:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:50,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:50,965 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:50,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:43:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:43:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:43:51,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:43:52,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:52,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715162614] [2021-11-19 15:43:52,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715162614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:52,089 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:52,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-19 15:43:52,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316076919] [2021-11-19 15:43:52,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:52,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:43:52,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:43:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:43:52,091 INFO L87 Difference]: Start difference. First operand 6611 states and 10416 transitions. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-19 15:43:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:54,304 INFO L93 Difference]: Finished difference Result 15505 states and 24658 transitions. [2021-11-19 15:43:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:43:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 134 [2021-11-19 15:43:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:54,402 INFO L225 Difference]: With dead ends: 15505 [2021-11-19 15:43:54,402 INFO L226 Difference]: Without dead ends: 11154 [2021-11-19 15:43:54,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:43:54,431 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 1200 mSDsluCounter, 3676 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 4556 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:54,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 4556 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:43:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-11-19 15:43:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10906. [2021-11-19 15:43:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10906 states, 8189 states have (on average 1.5149590914641593) internal successors, (12406), 8525 states have internal predecessors, (12406), 2012 states have call successors, (2012), 621 states have call predecessors, (2012), 704 states have return successors, (2725), 2035 states have call predecessors, (2725), 1982 states have call successors, (2725) [2021-11-19 15:43:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10906 states to 10906 states and 17143 transitions. [2021-11-19 15:43:55,458 INFO L78 Accepts]: Start accepts. Automaton has 10906 states and 17143 transitions. Word has length 134 [2021-11-19 15:43:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:55,459 INFO L470 AbstractCegarLoop]: Abstraction has 10906 states and 17143 transitions. [2021-11-19 15:43:55,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-19 15:43:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 10906 states and 17143 transitions. [2021-11-19 15:43:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 15:43:55,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:55,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:55,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:43:55,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:43:55,683 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash 292185497, now seen corresponding path program 1 times [2021-11-19 15:43:55,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:43:55,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294509126] [2021-11-19 15:43:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:55,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:43:55,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:43:55,685 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:43:55,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:43:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:43:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:43:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:43:56,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:43:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:43:56,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:43:56,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294509126] [2021-11-19 15:43:56,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294509126] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:43:56,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:43:56,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-19 15:43:56,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175290995] [2021-11-19 15:43:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:56,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:43:56,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:43:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:43:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:43:56,996 INFO L87 Difference]: Start difference. First operand 10906 states and 17143 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 15:44:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:01,833 INFO L93 Difference]: Finished difference Result 19572 states and 30854 transitions. [2021-11-19 15:44:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:44:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2021-11-19 15:44:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:01,897 INFO L225 Difference]: With dead ends: 19572 [2021-11-19 15:44:01,897 INFO L226 Difference]: Without dead ends: 11100 [2021-11-19 15:44:01,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:44:01,944 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1923 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 3490 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 3490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:01,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 2447 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 3490 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 15:44:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11100 states. [2021-11-19 15:44:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11100 to 10850. [2021-11-19 15:44:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 8157 states have (on average 1.51501777614319) internal successors, (12358), 8493 states have internal predecessors, (12358), 1996 states have call successors, (1996), 613 states have call predecessors, (1996), 696 states have return successors, (2709), 2019 states have call predecessors, (2709), 1966 states have call successors, (2709) [2021-11-19 15:44:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 17063 transitions. [2021-11-19 15:44:02,696 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 17063 transitions. Word has length 136 [2021-11-19 15:44:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:02,697 INFO L470 AbstractCegarLoop]: Abstraction has 10850 states and 17063 transitions. [2021-11-19 15:44:02,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 15:44:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 17063 transitions. [2021-11-19 15:44:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 15:44:02,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:02,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:02,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:02,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:02,920 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1577666288, now seen corresponding path program 1 times [2021-11-19 15:44:02,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:02,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518446270] [2021-11-19 15:44:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:02,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:02,923 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:02,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:44:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:44:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:44:03,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:44:04,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:04,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518446270] [2021-11-19 15:44:04,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518446270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:04,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:04,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-19 15:44:04,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353410623] [2021-11-19 15:44:04,332 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:04,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:44:04,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:44:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:44:04,333 INFO L87 Difference]: Start difference. First operand 10850 states and 17063 transitions. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 15:44:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:09,162 INFO L93 Difference]: Finished difference Result 27858 states and 44210 transitions. [2021-11-19 15:44:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 15:44:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 139 [2021-11-19 15:44:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:09,289 INFO L225 Difference]: With dead ends: 27858 [2021-11-19 15:44:09,290 INFO L226 Difference]: Without dead ends: 19268 [2021-11-19 15:44:09,366 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 15:44:09,367 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 2065 mSDsluCounter, 5579 mSDsCounter, 0 mSdLazyCounter, 2824 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:09,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2077 Valid, 6678 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2824 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 15:44:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-11-19 15:44:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 19146. [2021-11-19 15:44:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19146 states, 14445 states have (on average 1.4968501211491865) internal successors, (21622), 15015 states have internal predecessors, (21622), 3422 states have call successors, (3422), 1127 states have call predecessors, (3422), 1278 states have return successors, (4981), 3463 states have call predecessors, (4981), 3368 states have call successors, (4981) [2021-11-19 15:44:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19146 states to 19146 states and 30025 transitions. [2021-11-19 15:44:11,241 INFO L78 Accepts]: Start accepts. Automaton has 19146 states and 30025 transitions. Word has length 139 [2021-11-19 15:44:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:11,242 INFO L470 AbstractCegarLoop]: Abstraction has 19146 states and 30025 transitions. [2021-11-19 15:44:11,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 15:44:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19146 states and 30025 transitions. [2021-11-19 15:44:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 15:44:11,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:11,249 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:11,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:11,467 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash -471256228, now seen corresponding path program 1 times [2021-11-19 15:44:11,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:11,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645505882] [2021-11-19 15:44:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:11,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:11,471 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:11,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:44:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:44:11,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:44:12,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:44:12,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:12,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645505882] [2021-11-19 15:44:12,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645505882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:12,577 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:12,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:44:12,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115038632] [2021-11-19 15:44:12,578 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:12,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:44:12,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:44:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:44:12,582 INFO L87 Difference]: Start difference. First operand 19146 states and 30025 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 15:44:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:13,968 INFO L93 Difference]: Finished difference Result 37470 states and 59454 transitions. [2021-11-19 15:44:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:44:13,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 146 [2021-11-19 15:44:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:14,083 INFO L225 Difference]: With dead ends: 37470 [2021-11-19 15:44:14,084 INFO L226 Difference]: Without dead ends: 19174 [2021-11-19 15:44:14,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:44:14,206 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 480 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 4091 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:14,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 4091 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:44:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-11-19 15:44:15,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 19154. [2021-11-19 15:44:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19154 states, 14449 states have (on average 1.4784414146307703) internal successors, (21362), 15023 states have internal predecessors, (21362), 3422 states have call successors, (3422), 1127 states have call predecessors, (3422), 1282 states have return successors, (4987), 3463 states have call predecessors, (4987), 3368 states have call successors, (4987) [2021-11-19 15:44:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19154 states to 19154 states and 29771 transitions. [2021-11-19 15:44:15,889 INFO L78 Accepts]: Start accepts. Automaton has 19154 states and 29771 transitions. Word has length 146 [2021-11-19 15:44:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:15,890 INFO L470 AbstractCegarLoop]: Abstraction has 19154 states and 29771 transitions. [2021-11-19 15:44:15,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 15:44:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19154 states and 29771 transitions. [2021-11-19 15:44:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 15:44:15,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:15,896 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:15,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:16,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:16,114 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1516062679, now seen corresponding path program 1 times [2021-11-19 15:44:16,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:16,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946269690] [2021-11-19 15:44:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:16,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:16,119 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:16,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:44:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:44:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:44:16,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-19 15:44:17,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:17,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946269690] [2021-11-19 15:44:17,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946269690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:17,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 15:44:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884753482] [2021-11-19 15:44:17,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:17,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:44:17,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:44:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:44:17,211 INFO L87 Difference]: Start difference. First operand 19154 states and 29771 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 15:44:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:19,008 INFO L93 Difference]: Finished difference Result 35814 states and 56336 transitions. [2021-11-19 15:44:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:44:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 151 [2021-11-19 15:44:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:19,118 INFO L225 Difference]: With dead ends: 35814 [2021-11-19 15:44:19,118 INFO L226 Difference]: Without dead ends: 19426 [2021-11-19 15:44:19,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:44:19,229 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 1285 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:19,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1285 Valid, 3002 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:44:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19426 states. [2021-11-19 15:44:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19426 to 19304. [2021-11-19 15:44:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19304 states, 14533 states have (on average 1.475676047615771) internal successors, (21446), 15149 states have internal predecessors, (21446), 3470 states have call successors, (3470), 1151 states have call predecessors, (3470), 1300 states have return successors, (5155), 3463 states have call predecessors, (5155), 3416 states have call successors, (5155) [2021-11-19 15:44:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19304 states to 19304 states and 30071 transitions. [2021-11-19 15:44:20,935 INFO L78 Accepts]: Start accepts. Automaton has 19304 states and 30071 transitions. Word has length 151 [2021-11-19 15:44:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:20,936 INFO L470 AbstractCegarLoop]: Abstraction has 19304 states and 30071 transitions. [2021-11-19 15:44:20,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 15:44:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19304 states and 30071 transitions. [2021-11-19 15:44:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 15:44:20,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:20,942 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:20,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:21,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:21,156 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 488498054, now seen corresponding path program 1 times [2021-11-19 15:44:21,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:21,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382847032] [2021-11-19 15:44:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:21,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:21,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:21,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:44:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:44:21,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:44:21,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-19 15:44:22,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:22,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382847032] [2021-11-19 15:44:22,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382847032] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:22,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:44:22,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 15:44:22,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934968843] [2021-11-19 15:44:22,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:22,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:44:22,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:44:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:44:22,628 INFO L87 Difference]: Start difference. First operand 19304 states and 30071 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:44:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:27,126 INFO L93 Difference]: Finished difference Result 39221 states and 62286 transitions. [2021-11-19 15:44:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:44:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-11-19 15:44:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:27,258 INFO L225 Difference]: With dead ends: 39221 [2021-11-19 15:44:27,258 INFO L226 Difference]: Without dead ends: 22673 [2021-11-19 15:44:27,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:44:27,535 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 1977 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2062 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:27,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2062 Valid, 2490 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2511 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 15:44:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22673 states. [2021-11-19 15:44:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22673 to 20633. [2021-11-19 15:44:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20633 states, 15607 states have (on average 1.4741462164413404) internal successors, (23007), 16241 states have internal predecessors, (23007), 3610 states have call successors, (3610), 1257 states have call predecessors, (3610), 1415 states have return successors, (5323), 3594 states have call predecessors, (5323), 3565 states have call successors, (5323) [2021-11-19 15:44:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20633 states to 20633 states and 31940 transitions. [2021-11-19 15:44:29,422 INFO L78 Accepts]: Start accepts. Automaton has 20633 states and 31940 transitions. Word has length 156 [2021-11-19 15:44:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:29,423 INFO L470 AbstractCegarLoop]: Abstraction has 20633 states and 31940 transitions. [2021-11-19 15:44:29,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:44:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 20633 states and 31940 transitions. [2021-11-19 15:44:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 15:44:29,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:29,429 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:29,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:29,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:29,644 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1190097928, now seen corresponding path program 1 times [2021-11-19 15:44:29,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:29,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192984858] [2021-11-19 15:44:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:29,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:29,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:29,646 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:29,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:44:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:29,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:44:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:44:30,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:44:31,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:31,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192984858] [2021-11-19 15:44:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192984858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:31,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:31,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-19 15:44:31,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321060347] [2021-11-19 15:44:31,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:31,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:44:31,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:44:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:44:31,051 INFO L87 Difference]: Start difference. First operand 20633 states and 31940 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-19 15:44:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:37,523 INFO L93 Difference]: Finished difference Result 41260 states and 64832 transitions. [2021-11-19 15:44:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:44:37,524 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) Word has length 156 [2021-11-19 15:44:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:37,624 INFO L225 Difference]: With dead ends: 41260 [2021-11-19 15:44:37,625 INFO L226 Difference]: Without dead ends: 10505 [2021-11-19 15:44:37,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:44:37,823 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 2302 mSDsluCounter, 2325 mSDsCounter, 0 mSdLazyCounter, 4294 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 4943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 4294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:37,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2403 Valid, 3070 Invalid, 4943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 4294 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 15:44:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10505 states. [2021-11-19 15:44:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10505 to 10382. [2021-11-19 15:44:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10382 states, 8030 states have (on average 1.4841843088418432) internal successors, (11918), 8321 states have internal predecessors, (11918), 1629 states have call successors, (1629), 672 states have call predecessors, (1629), 722 states have return successors, (2253), 1590 states have call predecessors, (2253), 1614 states have call successors, (2253) [2021-11-19 15:44:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10382 states to 10382 states and 15800 transitions. [2021-11-19 15:44:38,693 INFO L78 Accepts]: Start accepts. Automaton has 10382 states and 15800 transitions. Word has length 156 [2021-11-19 15:44:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:38,694 INFO L470 AbstractCegarLoop]: Abstraction has 10382 states and 15800 transitions. [2021-11-19 15:44:38,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-19 15:44:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10382 states and 15800 transitions. [2021-11-19 15:44:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-19 15:44:38,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:38,741 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:38,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:38,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:38,958 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 777184883, now seen corresponding path program 1 times [2021-11-19 15:44:38,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:38,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851922814] [2021-11-19 15:44:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:38,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:38,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:38,962 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:39,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:44:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:44:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2021-11-19 15:44:40,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2021-11-19 15:44:41,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:41,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851922814] [2021-11-19 15:44:41,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851922814] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:41,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:44:41,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 15:44:41,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937445319] [2021-11-19 15:44:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:41,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:44:41,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:44:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:44:41,803 INFO L87 Difference]: Start difference. First operand 10382 states and 15800 transitions. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 15:44:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:42,444 INFO L93 Difference]: Finished difference Result 20662 states and 32003 transitions. [2021-11-19 15:44:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:44:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 505 [2021-11-19 15:44:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:42,488 INFO L225 Difference]: With dead ends: 20662 [2021-11-19 15:44:42,488 INFO L226 Difference]: Without dead ends: 11100 [2021-11-19 15:44:42,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:44:42,522 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 67 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3889 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:42,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 3889 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:44:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11100 states. [2021-11-19 15:44:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11100 to 10512. [2021-11-19 15:44:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10512 states, 8134 states have (on average 1.4779936070813868) internal successors, (12022), 8425 states have internal predecessors, (12022), 1629 states have call successors, (1629), 672 states have call predecessors, (1629), 748 states have return successors, (2297), 1616 states have call predecessors, (2297), 1614 states have call successors, (2297) [2021-11-19 15:44:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 15948 transitions. [2021-11-19 15:44:43,236 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 15948 transitions. Word has length 505 [2021-11-19 15:44:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:43,236 INFO L470 AbstractCegarLoop]: Abstraction has 10512 states and 15948 transitions. [2021-11-19 15:44:43,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 15:44:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 15948 transitions. [2021-11-19 15:44:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-19 15:44:43,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:43,275 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 15:44:43,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:43,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:43,495 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1387960355, now seen corresponding path program 1 times [2021-11-19 15:44:43,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:43,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482369155] [2021-11-19 15:44:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:43,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:43,498 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:43,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:44:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:44:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-11-19 15:44:45,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 35 proven. 67 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-11-19 15:44:46,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:46,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482369155] [2021-11-19 15:44:46,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482369155] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:46,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:44:46,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 15:44:46,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148099956] [2021-11-19 15:44:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:46,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:44:46,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:44:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:44:46,667 INFO L87 Difference]: Start difference. First operand 10512 states and 15948 transitions. Second operand has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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 15:44:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:52,113 INFO L93 Difference]: Finished difference Result 30138 states and 46803 transitions. [2021-11-19 15:44:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:44:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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 505 [2021-11-19 15:44:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:52,188 INFO L225 Difference]: With dead ends: 30138 [2021-11-19 15:44:52,188 INFO L226 Difference]: Without dead ends: 19418 [2021-11-19 15:44:52,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 1001 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:44:52,232 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 2293 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:52,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2452 Valid, 2373 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 3273 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 15:44:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-11-19 15:44:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 18607. [2021-11-19 15:44:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18607 states, 14181 states have (on average 1.4689373104858614) internal successors, (20831), 14738 states have internal predecessors, (20831), 3021 states have call successors, (3021), 1261 states have call predecessors, (3021), 1404 states have return successors, (4601), 2987 states have call predecessors, (4601), 3002 states have call successors, (4601) [2021-11-19 15:44:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 28453 transitions. [2021-11-19 15:44:53,392 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 28453 transitions. Word has length 505 [2021-11-19 15:44:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:53,393 INFO L470 AbstractCegarLoop]: Abstraction has 18607 states and 28453 transitions. [2021-11-19 15:44:53,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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 15:44:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 28453 transitions. [2021-11-19 15:44:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-19 15:44:53,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:53,427 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:53,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:44:53,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:44:53,628 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1657945311, now seen corresponding path program 1 times [2021-11-19 15:44:53,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:44:53,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263971404] [2021-11-19 15:44:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:53,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:44:53,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:44:53,631 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:44:53,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:44:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:44:54,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:55,537 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 15:44:55,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:57,043 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 15:44:57,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:44:57,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263971404] [2021-11-19 15:44:57,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263971404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:44:57,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333552759] [2021-11-19 15:44:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:57,044 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:57,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:44:57,046 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:44:57,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 15:44:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:44:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:44:58,561 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 15:44:58,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:44:59,762 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 15:44:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [333552759] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:44:59,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:44:59,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-19 15:44:59,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448795746] [2021-11-19 15:44:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:59,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:44:59,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:44:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:44:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:44:59,767 INFO L87 Difference]: Start difference. First operand 18607 states and 28453 transitions. Second operand has 9 states, 8 states have (on average 28.0) internal successors, (224), 9 states have internal predecessors, (224), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 15:45:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:03,047 INFO L93 Difference]: Finished difference Result 51591 states and 81138 transitions. [2021-11-19 15:45:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 15:45:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 28.0) internal successors, (224), 9 states have internal predecessors, (224), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 484 [2021-11-19 15:45:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:03,226 INFO L225 Difference]: With dead ends: 51591 [2021-11-19 15:45:03,227 INFO L226 Difference]: Without dead ends: 32498 [2021-11-19 15:45:03,328 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 15:45:03,328 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 736 mSDsluCounter, 7985 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 9255 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 15:45:03,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 9255 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 15:45:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32498 states. [2021-11-19 15:45:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32498 to 31856. [2021-11-19 15:45:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31856 states, 24108 states have (on average 1.4769371163099385) internal successors, (35606), 25144 states have internal predecessors, (35606), 5376 states have call successors, (5376), 2147 states have call predecessors, (5376), 2371 states have return successors, (8262), 5324 states have call predecessors, (8262), 5347 states have call successors, (8262) [2021-11-19 15:45:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31856 states to 31856 states and 49244 transitions. [2021-11-19 15:45:05,753 INFO L78 Accepts]: Start accepts. Automaton has 31856 states and 49244 transitions. Word has length 484 [2021-11-19 15:45:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:05,753 INFO L470 AbstractCegarLoop]: Abstraction has 31856 states and 49244 transitions. [2021-11-19 15:45:05,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 28.0) internal successors, (224), 9 states have internal predecessors, (224), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 15:45:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 31856 states and 49244 transitions. [2021-11-19 15:45:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-19 15:45:05,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:05,811 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:05,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:06,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:06,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:06,216 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash 883918235, now seen corresponding path program 1 times [2021-11-19 15:45:06,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:06,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308852395] [2021-11-19 15:45:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:06,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:06,219 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:06,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 15:45:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:45:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:08,054 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 15:45:08,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:09,526 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 15:45:09,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:09,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308852395] [2021-11-19 15:45:09,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308852395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:09,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848561462] [2021-11-19 15:45:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:09,528 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:45:09,529 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:45:09,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 15:45:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:45:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:11,472 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 15:45:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:13,132 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 15:45:13,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1848561462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:13,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761706624] [2021-11-19 15:45:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:13,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:45:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:45:13,135 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:45:13,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 15:45:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:13,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:45:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:14,414 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 15:45:14,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:15,939 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 15:45:15,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761706624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:45:15,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:45:15,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-19 15:45:15,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809474058] [2021-11-19 15:45:15,940 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:45:15,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 15:45:15,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 15:45:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:45:15,947 INFO L87 Difference]: Start difference. First operand 31856 states and 49244 transitions. Second operand has 27 states, 26 states have (on average 18.53846153846154) internal successors, (482), 24 states have internal predecessors, (482), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-19 15:45:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:50,660 INFO L93 Difference]: Finished difference Result 93394 states and 152382 transitions. [2021-11-19 15:45:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-19 15:45:50,662 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 18.53846153846154) internal successors, (482), 24 states have internal predecessors, (482), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) Word has length 486 [2021-11-19 15:45:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:51,018 INFO L225 Difference]: With dead ends: 93394 [2021-11-19 15:45:51,018 INFO L226 Difference]: Without dead ends: 61367 [2021-11-19 15:45:51,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3005 GetRequests, 2920 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 15:45:51,558 INFO L933 BasicCegarLoop]: 1987 mSDtfsCounter, 11603 mSDsluCounter, 7558 mSDsCounter, 0 mSdLazyCounter, 22807 mSolverCounterSat, 5514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11603 SdHoareTripleChecker+Valid, 9545 SdHoareTripleChecker+Invalid, 28321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5514 IncrementalHoareTripleChecker+Valid, 22807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:51,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11603 Valid, 9545 Invalid, 28321 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5514 Valid, 22807 Invalid, 0 Unknown, 0 Unchecked, 27.1s Time] [2021-11-19 15:45:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61367 states. [2021-11-19 15:45:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61367 to 46214. [2021-11-19 15:45:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46214 states, 34742 states have (on average 1.439611997006505) internal successors, (50015), 36155 states have internal predecessors, (50015), 7738 states have call successors, (7738), 3427 states have call predecessors, (7738), 3733 states have return successors, (12203), 7587 states have call predecessors, (12203), 7710 states have call successors, (12203) [2021-11-19 15:45:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46214 states to 46214 states and 69956 transitions. [2021-11-19 15:45:55,459 INFO L78 Accepts]: Start accepts. Automaton has 46214 states and 69956 transitions. Word has length 486 [2021-11-19 15:45:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:55,460 INFO L470 AbstractCegarLoop]: Abstraction has 46214 states and 69956 transitions. [2021-11-19 15:45:55,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 18.53846153846154) internal successors, (482), 24 states have internal predecessors, (482), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-19 15:45:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 46214 states and 69956 transitions. [2021-11-19 15:45:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-19 15:45:55,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:55,485 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:55,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:55,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-19 15:45:56,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:56,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:56,086 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2062253718, now seen corresponding path program 1 times [2021-11-19 15:45:56,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:56,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270319153] [2021-11-19 15:45:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:56,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:56,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:56,091 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:56,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 15:45:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:56,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:45:56,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-19 15:45:57,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-19 15:45:58,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:58,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270319153] [2021-11-19 15:45:58,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270319153] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:58,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:58,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:45:58,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681482881] [2021-11-19 15:45:58,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:58,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:45:58,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:45:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:58,856 INFO L87 Difference]: Start difference. First operand 46214 states and 69956 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-19 15:46:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:02,710 INFO L93 Difference]: Finished difference Result 90662 states and 138949 transitions. [2021-11-19 15:46:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:46:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 502 [2021-11-19 15:46:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:02,934 INFO L225 Difference]: With dead ends: 90662 [2021-11-19 15:46:02,934 INFO L226 Difference]: Without dead ends: 47268 [2021-11-19 15:46:03,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:46:03,148 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 101 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:03,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2094 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47268 states. [2021-11-19 15:46:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47268 to 47268. [2021-11-19 15:46:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47268 states, 35718 states have (on average 1.4368945629654515) internal successors, (51323), 37131 states have internal predecessors, (51323), 7738 states have call successors, (7738), 3505 states have call predecessors, (7738), 3811 states have return successors, (12203), 7587 states have call predecessors, (12203), 7710 states have call successors, (12203) [2021-11-19 15:46:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47268 states to 47268 states and 71264 transitions. [2021-11-19 15:46:07,068 INFO L78 Accepts]: Start accepts. Automaton has 47268 states and 71264 transitions. Word has length 502 [2021-11-19 15:46:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:07,070 INFO L470 AbstractCegarLoop]: Abstraction has 47268 states and 71264 transitions. [2021-11-19 15:46:07,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-19 15:46:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47268 states and 71264 transitions. [2021-11-19 15:46:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-19 15:46:07,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:07,105 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:07,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:07,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:07,306 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash -799213120, now seen corresponding path program 1 times [2021-11-19 15:46:07,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:07,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749357382] [2021-11-19 15:46:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:07,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:07,310 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:07,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f7acd-49a0-4954-9a6a-8610be0173df/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 15:46:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:46:08,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-11-19 15:46:09,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-11-19 15:46:10,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:10,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749357382] [2021-11-19 15:46:10,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749357382] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:10,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:10,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:46:10,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086210601] [2021-11-19 15:46:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:10,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:46:10,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:10,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:46:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:46:10,398 INFO L87 Difference]: Start difference. First operand 47268 states and 71264 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41)