./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:29:49,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:29:49,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:29:49,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:29:49,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:29:49,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:29:49,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:29:49,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:29:49,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:29:49,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:29:49,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:29:49,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:29:49,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:29:49,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:29:49,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:29:50,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:29:50,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:29:50,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:29:50,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:29:50,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:29:50,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:29:50,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:29:50,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:29:50,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:29:50,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:29:50,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:29:50,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:29:50,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:29:50,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:29:50,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:29:50,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:29:50,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:29:50,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:29:50,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:29:50,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:29:50,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:29:50,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:29:50,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:29:50,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:29:50,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:29:50,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:29:50,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:29:50,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:29:50,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:29:50,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:29:50,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:29:50,084 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:29:50,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:29:50,084 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:29:50,085 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:29:50,085 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:29:50,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:29:50,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:29:50,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:29:50,087 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:29:50,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:29:50,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:29:50,088 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:29:50,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:29:50,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:29:50,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:29:50,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:29:50,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:29:50,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:29:50,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:29:50,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:29:50,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:29:50,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:29:50,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:29:50,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:29:50,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:29:50,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:29:50,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:29:50,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:50,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:29:50,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:29:50,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:29:50,096 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:29:50,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:29:50,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:29:50,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:29:50,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:29:50,097 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_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-11-13 01:29:50,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:29:50,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:29:50,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:29:50,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:29:50,451 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:29:50,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-13 01:29:50,543 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/4327074a5/902b5d3ea4514c08b777fe5a6574c0e1/FLAG219353222 [2021-11-13 01:29:51,429 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:29:51,430 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-13 01:29:51,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/4327074a5/902b5d3ea4514c08b777fe5a6574c0e1/FLAG219353222 [2021-11-13 01:29:51,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/4327074a5/902b5d3ea4514c08b777fe5a6574c0e1 [2021-11-13 01:29:51,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:29:51,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:29:51,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:51,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:29:51,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:29:51,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:51" (1/1) ... [2021-11-13 01:29:51,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7308a560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:51, skipping insertion in model container [2021-11-13 01:29:51,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:51" (1/1) ... [2021-11-13 01:29:51,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:29:51,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:52,285 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-13 01:29:52,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:52,443 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) [2021-11-13 01:29:52,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c81b8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:52, skipping insertion in model container [2021-11-13 01:29:52,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:52,444 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:29:52,447 INFO L158 Benchmark]: Toolchain (without parser) took 910.00ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 47.9MB in the beginning and 65.3MB in the end (delta: -17.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 01:29:52,449 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 56.5MB in the beginning and 56.5MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:29:52,450 INFO L158 Benchmark]: CACSL2BoogieTranslator took 906.89ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 47.7MB in the beginning and 65.8MB in the end (delta: -18.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 01:29:52,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 56.5MB in the beginning and 56.5MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 906.89ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 47.7MB in the beginning and 65.8MB in the end (delta: -18.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3004]: 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_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:29:54,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:29:54,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:29:54,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:29:54,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:29:54,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:29:54,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:29:54,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:29:54,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:29:54,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:29:54,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:29:54,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:29:54,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:29:54,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:29:54,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:29:54,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:29:54,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:29:54,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:29:54,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:29:54,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:29:54,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:29:54,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:29:54,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:29:54,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:29:54,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:29:54,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:29:54,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:29:54,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:29:54,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:29:54,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:29:54,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:29:54,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:29:54,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:29:54,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:29:54,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:29:54,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:29:54,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:29:54,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:29:54,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:29:54,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:29:54,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:29:54,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:29:54,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:29:54,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:29:54,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:29:54,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:29:54,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:29:54,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:29:54,839 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:29:54,839 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:29:54,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:29:54,840 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:29:54,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:29:54,842 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:29:54,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:29:54,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:29:54,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:29:54,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:29:54,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:29:54,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:29:54,844 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:29:54,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:29:54,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:29:54,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:29:54,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:29:54,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:29:54,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:29:54,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:29:54,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:29:54,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:54,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:29:54,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:29:54,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:29:54,847 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:29:54,847 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:54,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:29:54,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:29:54,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:29:54,848 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_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-11-13 01:29:55,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:29:55,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:29:55,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:29:55,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:29:55,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:29:55,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-13 01:29:55,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/b92bbdcd5/c51f6b6624b54aebbffa3c2605ad6bd9/FLAGb571c58da [2021-11-13 01:29:56,106 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:29:56,110 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-13 01:29:56,162 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/b92bbdcd5/c51f6b6624b54aebbffa3c2605ad6bd9/FLAGb571c58da [2021-11-13 01:29:56,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/data/b92bbdcd5/c51f6b6624b54aebbffa3c2605ad6bd9 [2021-11-13 01:29:56,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:29:56,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:29:56,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:56,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:29:56,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:29:56,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:56" (1/1) ... [2021-11-13 01:29:56,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dfb3b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:56, skipping insertion in model container [2021-11-13 01:29:56,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:56" (1/1) ... [2021-11-13 01:29:56,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:29:56,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:56,927 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-13 01:29:57,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:57,060 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:29:57,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:57,153 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-13 01:29:57,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:57,180 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:29:57,242 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-13 01:29:57,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:57,288 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:29:57,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57 WrapperNode [2021-11-13 01:29:57,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:57,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:29:57,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:29:57,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:29:57,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:29:57,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:29:57,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:29:57,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:29:57,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:29:57,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:29:57,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:29:57,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:29:57,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (1/1) ... [2021-11-13 01:29:57,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:57,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:29:57,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:29:57,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:29:57,657 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 01:29:57,657 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 01:29:57,657 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-13 01:29:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-13 01:29:57,658 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 01:29:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 01:29:57,658 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-13 01:29:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-13 01:29:57,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:29:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 01:29:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 01:29:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 01:29:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 01:29:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 01:29:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 01:29:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 01:29:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 01:29:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-13 01:29:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-13 01:29:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 01:29:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 01:29:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 01:29:57,661 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 01:29:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 01:29:57,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 01:29:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 01:29:57,661 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 01:29:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 01:29:57,662 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 01:29:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 01:29:57,662 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 01:29:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:29:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 01:29:57,663 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 01:29:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 01:29:57,664 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 01:29:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 01:29:57,664 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 01:29:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 01:29:57,664 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 01:29:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 01:29:57,665 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 01:29:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-13 01:29:57,665 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-13 01:29:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 01:29:57,665 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 01:29:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 01:29:57,666 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 01:29:57,666 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 01:29:57,667 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 01:29:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:29:57,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:29:57,669 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 01:29:57,669 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 01:30:01,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:30:01,715 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-13 01:30:01,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:30:01 BoogieIcfgContainer [2021-11-13 01:30:01,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:30:01,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:30:01,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:30:01,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:30:01,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:29:56" (1/3) ... [2021-11-13 01:30:01,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684462ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:30:01, skipping insertion in model container [2021-11-13 01:30:01,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:57" (2/3) ... [2021-11-13 01:30:01,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684462ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:30:01, skipping insertion in model container [2021-11-13 01:30:01,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:30:01" (3/3) ... [2021-11-13 01:30:01,728 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2021-11-13 01:30:01,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:30:01,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:30:01,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:30:01,824 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 [2021-11-13 01:30:01,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:30:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 601 states, 474 states have (on average 1.6940928270042195) internal successors, (803), 492 states have internal predecessors, (803), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-13 01:30:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:30:01,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:01,913 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:01,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1730037928, now seen corresponding path program 1 times [2021-11-13 01:30:01,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:01,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45068348] [2021-11-13 01:30:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:01,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:01,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:01,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:30:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:30:02,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:30:02,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:30:03,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:03,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45068348] [2021-11-13 01:30:03,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45068348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:03,123 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:03,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:30:03,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364071750] [2021-11-13 01:30:03,126 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:03,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:30:03,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:30:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:30:03,158 INFO L87 Difference]: Start difference. First operand has 601 states, 474 states have (on average 1.6940928270042195) internal successors, (803), 492 states have internal predecessors, (803), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:30:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:03,252 INFO L93 Difference]: Finished difference Result 1180 states and 1989 transitions. [2021-11-13 01:30:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:30:03,254 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 114 [2021-11-13 01:30:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:03,278 INFO L225 Difference]: With dead ends: 1180 [2021-11-13 01:30:03,278 INFO L226 Difference]: Without dead ends: 591 [2021-11-13 01:30:03,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:30:03,291 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:03,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 7.33ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:30:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-13 01:30:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-13 01:30:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 467 states have (on average 1.676659528907923) internal successors, (783), 483 states have internal predecessors, (783), 100 states have call successors, (100), 25 states have call predecessors, (100), 23 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:30:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 980 transitions. [2021-11-13 01:30:03,397 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 980 transitions. Word has length 114 [2021-11-13 01:30:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:03,399 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 980 transitions. [2021-11-13 01:30:03,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:30:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 980 transitions. [2021-11-13 01:30:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:30:03,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:03,423 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:03,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 01:30:03,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:03,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash -923073288, now seen corresponding path program 1 times [2021-11-13 01:30:03,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:03,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664260167] [2021-11-13 01:30:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:03,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:03,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:03,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:03,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:30:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:30:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:30:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:30:04,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:04,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664260167] [2021-11-13 01:30:04,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664260167] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:04,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:04,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:30:04,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296650318] [2021-11-13 01:30:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:04,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:30:04,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:30:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:04,771 INFO L87 Difference]: Start difference. First operand 591 states and 980 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:04,899 INFO L93 Difference]: Finished difference Result 1178 states and 1960 transitions. [2021-11-13 01:30:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2021-11-13 01:30:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:04,907 INFO L225 Difference]: With dead ends: 1178 [2021-11-13 01:30:04,908 INFO L226 Difference]: Without dead ends: 595 [2021-11-13 01:30:04,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:04,914 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 15 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.15ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:04,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2886 Invalid, 43 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 49.15ms Time] [2021-11-13 01:30:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-13 01:30:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-13 01:30:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 470 states have (on average 1.672340425531915) internal successors, (786), 486 states have internal predecessors, (786), 100 states have call successors, (100), 26 states have call predecessors, (100), 24 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:30:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 983 transitions. [2021-11-13 01:30:04,973 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 983 transitions. Word has length 114 [2021-11-13 01:30:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:04,975 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 983 transitions. [2021-11-13 01:30:04,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 983 transitions. [2021-11-13 01:30:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:30:04,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:04,991 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:05,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:05,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:05,208 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1003991098, now seen corresponding path program 1 times [2021-11-13 01:30:05,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:05,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027604350] [2021-11-13 01:30:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:05,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:05,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:30:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:05,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:06,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:06,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:06,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027604350] [2021-11-13 01:30:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027604350] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:06,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:06,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:30:06,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517455487] [2021-11-13 01:30:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:06,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:06,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:30:06,491 INFO L87 Difference]: Start difference. First operand 595 states and 983 transitions. Second operand has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:06,774 INFO L93 Difference]: Finished difference Result 1202 states and 1991 transitions. [2021-11-13 01:30:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:06,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2021-11-13 01:30:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:06,781 INFO L225 Difference]: With dead ends: 1202 [2021-11-13 01:30:06,782 INFO L226 Difference]: Without dead ends: 617 [2021-11-13 01:30:06,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:30:06,787 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 119 mSDsluCounter, 4767 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5742 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:06,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5742 Invalid, 98 Unknown, 0 Unchecked, 14.71ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 195.40ms Time] [2021-11-13 01:30:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-13 01:30:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 608. [2021-11-13 01:30:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 480 states have (on average 1.66875) internal successors, (801), 498 states have internal predecessors, (801), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-13 01:30:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1005 transitions. [2021-11-13 01:30:06,837 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1005 transitions. Word has length 116 [2021-11-13 01:30:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:06,837 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1005 transitions. [2021-11-13 01:30:06,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1005 transitions. [2021-11-13 01:30:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:30:06,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:06,844 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:06,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:07,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:07,067 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:07,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1811840057, now seen corresponding path program 1 times [2021-11-13 01:30:07,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:07,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508873608] [2021-11-13 01:30:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:07,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:07,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:07,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:30:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:07,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:08,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:08,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508873608] [2021-11-13 01:30:08,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508873608] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:08,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:08,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:30:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779550896] [2021-11-13 01:30:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:08,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:08,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:30:08,290 INFO L87 Difference]: Start difference. First operand 608 states and 1005 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:08,662 INFO L93 Difference]: Finished difference Result 1222 states and 2024 transitions. [2021-11-13 01:30:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-11-13 01:30:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:08,668 INFO L225 Difference]: With dead ends: 1222 [2021-11-13 01:30:08,668 INFO L226 Difference]: Without dead ends: 626 [2021-11-13 01:30:08,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:30:08,673 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 105 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5790 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.95ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:08,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5790 Invalid, 120 Unknown, 0 Unchecked, 13.02ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 292.95ms Time] [2021-11-13 01:30:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-13 01:30:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 608. [2021-11-13 01:30:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 480 states have (on average 1.66875) internal successors, (801), 498 states have internal predecessors, (801), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-13 01:30:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1005 transitions. [2021-11-13 01:30:08,706 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1005 transitions. Word has length 117 [2021-11-13 01:30:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:08,707 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1005 transitions. [2021-11-13 01:30:08,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1005 transitions. [2021-11-13 01:30:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:30:08,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:08,713 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:08,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:08,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:08,928 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1258723173, now seen corresponding path program 1 times [2021-11-13 01:30:08,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:08,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712877015] [2021-11-13 01:30:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:08,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:08,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:08,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:30:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:09,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:30:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:30:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:30:10,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:10,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712877015] [2021-11-13 01:30:10,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712877015] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:10,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:10,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 01:30:10,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536472791] [2021-11-13 01:30:10,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:10,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:30:10,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:30:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:30:10,013 INFO L87 Difference]: Start difference. First operand 608 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:10,108 INFO L93 Difference]: Finished difference Result 1207 states and 1999 transitions. [2021-11-13 01:30:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-13 01:30:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:10,115 INFO L225 Difference]: With dead ends: 1207 [2021-11-13 01:30:10,115 INFO L226 Difference]: Without dead ends: 609 [2021-11-13 01:30:10,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:10,121 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 22 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:10,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2886 Invalid, 36 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 45.73ms Time] [2021-11-13 01:30:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-13 01:30:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2021-11-13 01:30:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 482 states have (on average 1.6680497925311204) internal successors, (804), 499 states have internal predecessors, (804), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-13 01:30:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1003 transitions. [2021-11-13 01:30:10,154 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1003 transitions. Word has length 117 [2021-11-13 01:30:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1003 transitions. [2021-11-13 01:30:10,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1003 transitions. [2021-11-13 01:30:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:30:10,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:10,161 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:10,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:10,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:10,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash -9990083, now seen corresponding path program 1 times [2021-11-13 01:30:10,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:10,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520755554] [2021-11-13 01:30:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:10,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:10,377 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:10,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:30:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:11,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:11,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520755554] [2021-11-13 01:30:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520755554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:11,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:30:11,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218883573] [2021-11-13 01:30:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:11,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:30:11,594 INFO L87 Difference]: Start difference. First operand 609 states and 1003 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:11,904 INFO L93 Difference]: Finished difference Result 1212 states and 2004 transitions. [2021-11-13 01:30:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2021-11-13 01:30:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:11,911 INFO L225 Difference]: With dead ends: 1212 [2021-11-13 01:30:11,911 INFO L226 Difference]: Without dead ends: 618 [2021-11-13 01:30:11,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:30:11,916 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 104 mSDsluCounter, 4755 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5733 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:11,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5733 Invalid, 107 Unknown, 0 Unchecked, 20.29ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 231.24ms Time] [2021-11-13 01:30:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-13 01:30:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 609. [2021-11-13 01:30:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 482 states have (on average 1.6680497925311204) internal successors, (804), 499 states have internal predecessors, (804), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-13 01:30:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1003 transitions. [2021-11-13 01:30:11,952 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1003 transitions. Word has length 119 [2021-11-13 01:30:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:11,953 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1003 transitions. [2021-11-13 01:30:11,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1003 transitions. [2021-11-13 01:30:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 01:30:11,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:11,959 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:11,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:12,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:12,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash -341935266, now seen corresponding path program 1 times [2021-11-13 01:30:12,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:12,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320300226] [2021-11-13 01:30:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:12,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:12,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:12,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:30:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:12,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:30:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:12,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:30:13,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:13,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320300226] [2021-11-13 01:30:13,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320300226] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:13,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:13,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:30:13,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066186763] [2021-11-13 01:30:13,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:13,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:30:13,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:30:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:13,293 INFO L87 Difference]: Start difference. First operand 609 states and 1003 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:13,525 INFO L93 Difference]: Finished difference Result 1232 states and 2042 transitions. [2021-11-13 01:30:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:13,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-13 01:30:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:13,532 INFO L225 Difference]: With dead ends: 1232 [2021-11-13 01:30:13,532 INFO L226 Difference]: Without dead ends: 638 [2021-11-13 01:30:13,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:13,537 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 112 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2730 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.55ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.06ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:13,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2730 Invalid, 147 Unknown, 0 Unchecked, 6.55ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 177.06ms Time] [2021-11-13 01:30:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-13 01:30:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 629. [2021-11-13 01:30:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 501 states have (on average 1.6626746506986028) internal successors, (833), 518 states have internal predecessors, (833), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:30:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1031 transitions. [2021-11-13 01:30:13,567 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1031 transitions. Word has length 120 [2021-11-13 01:30:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:13,567 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1031 transitions. [2021-11-13 01:30:13,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1031 transitions. [2021-11-13 01:30:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 01:30:13,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:13,573 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:13,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:13,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:13,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:13,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1645884601, now seen corresponding path program 1 times [2021-11-13 01:30:13,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:13,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113896083] [2021-11-13 01:30:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:13,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:13,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:13,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:13,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:30:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:14,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:14,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:14,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:14,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113896083] [2021-11-13 01:30:14,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113896083] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:14,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:14,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:30:14,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100319086] [2021-11-13 01:30:14,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:14,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:14,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:30:14,901 INFO L87 Difference]: Start difference. First operand 629 states and 1031 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:15,147 INFO L93 Difference]: Finished difference Result 1261 states and 2073 transitions. [2021-11-13 01:30:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 121 [2021-11-13 01:30:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:15,156 INFO L225 Difference]: With dead ends: 1261 [2021-11-13 01:30:15,156 INFO L226 Difference]: Without dead ends: 647 [2021-11-13 01:30:15,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:30:15,165 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 154 mSDsluCounter, 4683 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5649 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.41ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:15,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5649 Invalid, 89 Unknown, 0 Unchecked, 15.41ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 168.13ms Time] [2021-11-13 01:30:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-13 01:30:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 629. [2021-11-13 01:30:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 501 states have (on average 1.6626746506986028) internal successors, (833), 518 states have internal predecessors, (833), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:30:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1031 transitions. [2021-11-13 01:30:15,201 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1031 transitions. Word has length 121 [2021-11-13 01:30:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:15,202 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1031 transitions. [2021-11-13 01:30:15,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1031 transitions. [2021-11-13 01:30:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 01:30:15,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:15,208 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:15,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:15,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:15,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 483679932, now seen corresponding path program 1 times [2021-11-13 01:30:15,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:15,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994020184] [2021-11-13 01:30:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:15,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:15,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:15,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:15,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:30:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:30:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:16,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:16,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:16,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994020184] [2021-11-13 01:30:16,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994020184] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:16,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:16,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:30:16,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423181055] [2021-11-13 01:30:16,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:30:16,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:30:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:30:16,593 INFO L87 Difference]: Start difference. First operand 629 states and 1031 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:16,895 INFO L93 Difference]: Finished difference Result 1256 states and 2064 transitions. [2021-11-13 01:30:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:30:16,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 122 [2021-11-13 01:30:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:16,901 INFO L225 Difference]: With dead ends: 1256 [2021-11-13 01:30:16,902 INFO L226 Difference]: Without dead ends: 642 [2021-11-13 01:30:16,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:30:16,907 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 112 mSDsluCounter, 5629 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6585 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.92ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.94ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:16,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6585 Invalid, 160 Unknown, 0 Unchecked, 10.92ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 217.94ms Time] [2021-11-13 01:30:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-13 01:30:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 633. [2021-11-13 01:30:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 505 states have (on average 1.6574257425742573) internal successors, (837), 522 states have internal predecessors, (837), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:30:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1035 transitions. [2021-11-13 01:30:16,933 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1035 transitions. Word has length 122 [2021-11-13 01:30:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:16,934 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1035 transitions. [2021-11-13 01:30:16,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1035 transitions. [2021-11-13 01:30:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 01:30:16,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:16,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:16,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:17,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:17,165 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1622711911, now seen corresponding path program 1 times [2021-11-13 01:30:17,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:17,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147586370] [2021-11-13 01:30:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:17,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:17,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:17,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:30:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:30:17,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:18,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147586370] [2021-11-13 01:30:18,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147586370] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:18,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:18,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:30:18,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332502426] [2021-11-13 01:30:18,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:18,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:30:18,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:30:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:30:18,349 INFO L87 Difference]: Start difference. First operand 633 states and 1035 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:18,739 INFO L93 Difference]: Finished difference Result 1266 states and 2076 transitions. [2021-11-13 01:30:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:30:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2021-11-13 01:30:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:18,746 INFO L225 Difference]: With dead ends: 1266 [2021-11-13 01:30:18,746 INFO L226 Difference]: Without dead ends: 648 [2021-11-13 01:30:18,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:30:18,752 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 108 mSDsluCounter, 5635 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6593 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 302.12ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:18,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6593 Invalid, 179 Unknown, 0 Unchecked, 8.39ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 302.12ms Time] [2021-11-13 01:30:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-13 01:30:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 639. [2021-11-13 01:30:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 511 states have (on average 1.649706457925636) internal successors, (843), 528 states have internal predecessors, (843), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:30:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1041 transitions. [2021-11-13 01:30:18,809 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1041 transitions. Word has length 123 [2021-11-13 01:30:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:18,810 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1041 transitions. [2021-11-13 01:30:18,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1041 transitions. [2021-11-13 01:30:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 01:30:18,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:18,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:18,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:19,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:19,016 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash 81252641, now seen corresponding path program 1 times [2021-11-13 01:30:19,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:19,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089840978] [2021-11-13 01:30:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:19,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:19,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:19,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:19,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:30:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:19,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:30:19,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:30:19,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:20,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:20,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089840978] [2021-11-13 01:30:20,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089840978] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:20,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:20,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:30:20,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628220970] [2021-11-13 01:30:20,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:20,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:30:20,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:20,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:30:20,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:30:20,176 INFO L87 Difference]: Start difference. First operand 639 states and 1041 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:20,580 INFO L93 Difference]: Finished difference Result 1280 states and 2092 transitions. [2021-11-13 01:30:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:30:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 124 [2021-11-13 01:30:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:20,587 INFO L225 Difference]: With dead ends: 1280 [2021-11-13 01:30:20,588 INFO L226 Difference]: Without dead ends: 656 [2021-11-13 01:30:20,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:30:20,592 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 108 mSDsluCounter, 5635 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6593 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 302.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:20,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6593 Invalid, 184 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 302.53ms Time] [2021-11-13 01:30:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-13 01:30:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 647. [2021-11-13 01:30:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 519 states have (on average 1.6396917148362236) internal successors, (851), 536 states have internal predecessors, (851), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:30:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1049 transitions. [2021-11-13 01:30:20,621 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1049 transitions. Word has length 124 [2021-11-13 01:30:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1049 transitions. [2021-11-13 01:30:20,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:30:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1049 transitions. [2021-11-13 01:30:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:30:20,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:20,627 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:20,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:20,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:20,844 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:20,845 INFO L85 PathProgramCache]: Analyzing trace with hash -352818850, now seen corresponding path program 1 times [2021-11-13 01:30:20,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:20,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162446063] [2021-11-13 01:30:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:20,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:20,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:30:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:21,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:21,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:21,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162446063] [2021-11-13 01:30:21,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162446063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:21,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:21,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:30:21,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775243241] [2021-11-13 01:30:21,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:21,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:30:21,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:30:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:30:21,922 INFO L87 Difference]: Start difference. First operand 647 states and 1049 transitions. Second operand has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:30:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:22,223 INFO L93 Difference]: Finished difference Result 1219 states and 1976 transitions. [2021-11-13 01:30:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:30:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 125 [2021-11-13 01:30:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:22,235 INFO L225 Difference]: With dead ends: 1219 [2021-11-13 01:30:22,235 INFO L226 Difference]: Without dead ends: 665 [2021-11-13 01:30:22,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:30:22,241 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 100 mSDsluCounter, 5621 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6587 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.33ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.43ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:22,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6587 Invalid, 119 Unknown, 0 Unchecked, 7.33ms Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 226.43ms Time] [2021-11-13 01:30:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-13 01:30:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 654. [2021-11-13 01:30:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.6347992351816443) internal successors, (855), 542 states have internal predecessors, (855), 101 states have call successors, (101), 28 states have call predecessors, (101), 29 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2021-11-13 01:30:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1058 transitions. [2021-11-13 01:30:22,284 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1058 transitions. Word has length 125 [2021-11-13 01:30:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:22,284 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1058 transitions. [2021-11-13 01:30:22,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:30:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1058 transitions. [2021-11-13 01:30:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 01:30:22,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:22,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:22,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:22,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:22,512 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash 336722548, now seen corresponding path program 1 times [2021-11-13 01:30:22,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:22,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892730127] [2021-11-13 01:30:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:22,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:22,515 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:22,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:30:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:23,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:23,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:23,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892730127] [2021-11-13 01:30:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892730127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:23,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:23,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:30:23,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519212795] [2021-11-13 01:30:23,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:30:23,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:30:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:30:23,698 INFO L87 Difference]: Start difference. First operand 654 states and 1058 transitions. Second operand has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:30:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:24,029 INFO L93 Difference]: Finished difference Result 1222 states and 1979 transitions. [2021-11-13 01:30:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:30:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 127 [2021-11-13 01:30:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:24,036 INFO L225 Difference]: With dead ends: 1222 [2021-11-13 01:30:24,036 INFO L226 Difference]: Without dead ends: 668 [2021-11-13 01:30:24,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:30:24,041 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 170 mSDsluCounter, 6671 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 7639 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.95ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 276.69ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:24,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 7639 Invalid, 156 Unknown, 0 Unchecked, 7.95ms Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 276.69ms Time] [2021-11-13 01:30:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-13 01:30:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 661. [2021-11-13 01:30:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 527 states have (on average 1.6299810246679316) internal successors, (859), 548 states have internal predecessors, (859), 102 states have call successors, (102), 28 states have call predecessors, (102), 31 states have return successors, (106), 97 states have call predecessors, (106), 99 states have call successors, (106) [2021-11-13 01:30:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1067 transitions. [2021-11-13 01:30:24,083 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1067 transitions. Word has length 127 [2021-11-13 01:30:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:24,083 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1067 transitions. [2021-11-13 01:30:24,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:30:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1067 transitions. [2021-11-13 01:30:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 01:30:24,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:24,089 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:24,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:24,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:24,310 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash 144923480, now seen corresponding path program 1 times [2021-11-13 01:30:24,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:24,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149260935] [2021-11-13 01:30:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:24,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:24,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:24,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:30:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:25,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:30:25,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:25,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149260935] [2021-11-13 01:30:25,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149260935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:25,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:25,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 01:30:25,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845112499] [2021-11-13 01:30:25,442 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:25,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:30:25,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:30:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:30:25,444 INFO L87 Difference]: Start difference. First operand 661 states and 1067 transitions. Second operand has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 01:30:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:25,680 INFO L93 Difference]: Finished difference Result 1223 states and 1980 transitions. [2021-11-13 01:30:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 127 [2021-11-13 01:30:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:25,687 INFO L225 Difference]: With dead ends: 1223 [2021-11-13 01:30:25,687 INFO L226 Difference]: Without dead ends: 669 [2021-11-13 01:30:25,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:30:25,692 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 145 mSDsluCounter, 5593 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6563 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.07ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:25,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 6563 Invalid, 101 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 189.07ms Time] [2021-11-13 01:30:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-13 01:30:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 664. [2021-11-13 01:30:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 529 states have (on average 1.6275992438563327) internal successors, (861), 551 states have internal predecessors, (861), 102 states have call successors, (102), 28 states have call predecessors, (102), 32 states have return successors, (107), 97 states have call predecessors, (107), 99 states have call successors, (107) [2021-11-13 01:30:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1070 transitions. [2021-11-13 01:30:25,720 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1070 transitions. Word has length 127 [2021-11-13 01:30:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:25,721 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1070 transitions. [2021-11-13 01:30:25,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 01:30:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1070 transitions. [2021-11-13 01:30:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 01:30:25,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:25,727 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:25,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:25,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:25,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1647777530, now seen corresponding path program 1 times [2021-11-13 01:30:25,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:25,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432219703] [2021-11-13 01:30:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:25,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:25,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:25,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:25,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:30:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:26,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:30:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:30:26,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:30:26,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:26,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432219703] [2021-11-13 01:30:26,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432219703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:26,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:26,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:30:26,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993574240] [2021-11-13 01:30:26,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:26,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:30:26,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:30:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:30:26,887 INFO L87 Difference]: Start difference. First operand 664 states and 1070 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:26,967 INFO L93 Difference]: Finished difference Result 1293 states and 2088 transitions. [2021-11-13 01:30:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 127 [2021-11-13 01:30:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:26,972 INFO L225 Difference]: With dead ends: 1293 [2021-11-13 01:30:26,973 INFO L226 Difference]: Without dead ends: 614 [2021-11-13 01:30:26,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:26,979 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 37 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.33ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:26,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1925 Invalid, 32 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 53.33ms Time] [2021-11-13 01:30:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-13 01:30:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-13 01:30:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 486 states have (on average 1.6111111111111112) internal successors, (783), 503 states have internal predecessors, (783), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:30:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 980 transitions. [2021-11-13 01:30:27,008 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 980 transitions. Word has length 127 [2021-11-13 01:30:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:27,008 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 980 transitions. [2021-11-13 01:30:27,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 980 transitions. [2021-11-13 01:30:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:30:27,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:27,013 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:27,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:27,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:27,227 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1551149653, now seen corresponding path program 1 times [2021-11-13 01:30:27,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:27,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233879671] [2021-11-13 01:30:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:27,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:27,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:27,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:30:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:30:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:30:27,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:30:28,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:28,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233879671] [2021-11-13 01:30:28,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233879671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:28,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:28,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:30:28,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296430855] [2021-11-13 01:30:28,205 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:28,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:30:28,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:30:28,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:28,209 INFO L87 Difference]: Start difference. First operand 614 states and 980 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:28,389 INFO L93 Difference]: Finished difference Result 1254 states and 1993 transitions. [2021-11-13 01:30:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:28,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 129 [2021-11-13 01:30:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:28,396 INFO L225 Difference]: With dead ends: 1254 [2021-11-13 01:30:28,397 INFO L226 Difference]: Without dead ends: 611 [2021-11-13 01:30:28,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:30:28,401 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 183 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.12ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:28,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 2719 Invalid, 92 Unknown, 0 Unchecked, 4.12ms Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 134.40ms Time] [2021-11-13 01:30:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-13 01:30:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2021-11-13 01:30:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 483 states have (on average 1.5900621118012421) internal successors, (768), 499 states have internal predecessors, (768), 100 states have call successors, (100), 29 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:30:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 965 transitions. [2021-11-13 01:30:28,428 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 965 transitions. Word has length 129 [2021-11-13 01:30:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:28,429 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 965 transitions. [2021-11-13 01:30:28,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 965 transitions. [2021-11-13 01:30:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 01:30:28,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:28,434 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:28,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:28,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:28,651 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash 794842570, now seen corresponding path program 1 times [2021-11-13 01:30:28,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:28,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488640737] [2021-11-13 01:30:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:28,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:28,653 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:28,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:30:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:30:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:30:29,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:30:30,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:30,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488640737] [2021-11-13 01:30:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488640737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:30,375 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:30,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-13 01:30:30,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934407378] [2021-11-13 01:30:30,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:30,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:30:30,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:30,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:30:30,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:30,377 INFO L87 Difference]: Start difference. First operand 611 states and 965 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:30:32,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:35,798 INFO L93 Difference]: Finished difference Result 1825 states and 2974 transitions. [2021-11-13 01:30:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 130 [2021-11-13 01:30:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:35,813 INFO L225 Difference]: With dead ends: 1825 [2021-11-13 01:30:35,813 INFO L226 Difference]: Without dead ends: 1275 [2021-11-13 01:30:35,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:35,819 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 1140 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 166 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4765.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 3920 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.84ms SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5299.74ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:35,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 3920 Invalid, 720 Unknown, 0 Unchecked, 19.84ms Time], IncrementalHoareTripleChecker [166 Valid, 553 Invalid, 1 Unknown, 0 Unchecked, 5299.74ms Time] [2021-11-13 01:30:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-11-13 01:30:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1172. [2021-11-13 01:30:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 928 states have (on average 1.6142241379310345) internal successors, (1498), 956 states have internal predecessors, (1498), 197 states have call successors, (197), 48 states have call predecessors, (197), 46 states have return successors, (202), 182 states have call predecessors, (202), 193 states have call successors, (202) [2021-11-13 01:30:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1897 transitions. [2021-11-13 01:30:35,911 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1897 transitions. Word has length 130 [2021-11-13 01:30:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1897 transitions. [2021-11-13 01:30:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:30:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1897 transitions. [2021-11-13 01:30:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 01:30:35,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:35,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:35,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:36,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:36,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1632877215, now seen corresponding path program 1 times [2021-11-13 01:30:36,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:36,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232728129] [2021-11-13 01:30:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:36,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:36,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:36,145 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:36,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:30:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 01:30:36,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:30:36,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:30:37,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:37,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232728129] [2021-11-13 01:30:37,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232728129] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:37,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:37,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-13 01:30:37,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125208081] [2021-11-13 01:30:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:37,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:37,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:30:37,547 INFO L87 Difference]: Start difference. First operand 1172 states and 1897 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:30:39,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:43,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:43,139 INFO L93 Difference]: Finished difference Result 3946 states and 6655 transitions. [2021-11-13 01:30:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:30:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 131 [2021-11-13 01:30:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:43,199 INFO L225 Difference]: With dead ends: 3946 [2021-11-13 01:30:43,199 INFO L226 Difference]: Without dead ends: 2835 [2021-11-13 01:30:43,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:30:43,205 INFO L933 BasicCegarLoop]: 1157 mSDtfsCounter, 1897 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 295 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4832.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.32ms SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5338.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:43,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 4554 Invalid, 1967 Unknown, 0 Unchecked, 26.32ms Time], IncrementalHoareTripleChecker [295 Valid, 1671 Invalid, 1 Unknown, 0 Unchecked, 5338.05ms Time] [2021-11-13 01:30:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-11-13 01:30:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2211. [2021-11-13 01:30:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 1747 states have (on average 1.638236977676016) internal successors, (2862), 1803 states have internal predecessors, (2862), 376 states have call successors, (376), 84 states have call predecessors, (376), 87 states have return successors, (444), 353 states have call predecessors, (444), 370 states have call successors, (444) [2021-11-13 01:30:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3682 transitions. [2021-11-13 01:30:43,360 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3682 transitions. Word has length 131 [2021-11-13 01:30:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:43,361 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 3682 transitions. [2021-11-13 01:30:43,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:30:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3682 transitions. [2021-11-13 01:30:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 01:30:43,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:43,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:43,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:43,582 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1796016503, now seen corresponding path program 1 times [2021-11-13 01:30:43,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:43,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335900583] [2021-11-13 01:30:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:43,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:43,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:43,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:43,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:30:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:44,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:30:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:30:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:30:44,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:44,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335900583] [2021-11-13 01:30:44,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335900583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:44,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:44,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:30:44,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802198895] [2021-11-13 01:30:44,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:44,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:44,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:44,758 INFO L87 Difference]: Start difference. First operand 2211 states and 3682 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 01:30:46,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:48,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:51,217 INFO L93 Difference]: Finished difference Result 7272 states and 12479 transitions. [2021-11-13 01:30:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:30:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 132 [2021-11-13 01:30:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:51,270 INFO L225 Difference]: With dead ends: 7272 [2021-11-13 01:30:51,270 INFO L226 Difference]: Without dead ends: 5122 [2021-11-13 01:30:51,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:30:51,290 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 1355 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 170 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5814.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.19ms SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6147.82ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:51,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 3604 Invalid, 1099 Unknown, 0 Unchecked, 18.19ms Time], IncrementalHoareTripleChecker [170 Valid, 927 Invalid, 2 Unknown, 0 Unchecked, 6147.82ms Time] [2021-11-13 01:30:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-11-13 01:30:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 4848. [2021-11-13 01:30:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4848 states, 3711 states have (on average 1.6081918620317974) internal successors, (5968), 3869 states have internal predecessors, (5968), 955 states have call successors, (955), 170 states have call predecessors, (955), 181 states have return successors, (1189), 888 states have call predecessors, (1189), 945 states have call successors, (1189) [2021-11-13 01:30:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 8112 transitions. [2021-11-13 01:30:51,691 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 8112 transitions. Word has length 132 [2021-11-13 01:30:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:51,692 INFO L470 AbstractCegarLoop]: Abstraction has 4848 states and 8112 transitions. [2021-11-13 01:30:51,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 01:30:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 8112 transitions. [2021-11-13 01:30:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 01:30:51,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:51,698 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:51,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:51,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:51,921 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1909820841, now seen corresponding path program 1 times [2021-11-13 01:30:51,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:51,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242402279] [2021-11-13 01:30:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:51,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:51,924 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:51,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:30:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:52,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:30:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:30:52,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:30:53,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:53,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242402279] [2021-11-13 01:30:53,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242402279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:53,295 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 7 [2021-11-13 01:30:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464485316] [2021-11-13 01:30:53,295 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:53,297 INFO L87 Difference]: Start difference. First operand 4848 states and 8112 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:30:55,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:57,568 INFO L93 Difference]: Finished difference Result 15554 states and 27661 transitions. [2021-11-13 01:30:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:30:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2021-11-13 01:30:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:57,671 INFO L225 Difference]: With dead ends: 15554 [2021-11-13 01:30:57,672 INFO L226 Difference]: Without dead ends: 10767 [2021-11-13 01:30:57,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:30:57,712 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 1242 mSDsluCounter, 4254 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 156 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3399.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 5488 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.28ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3634.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:57,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 5488 Invalid, 707 Unknown, 0 Unchecked, 20.28ms Time], IncrementalHoareTripleChecker [156 Valid, 550 Invalid, 1 Unknown, 0 Unchecked, 3634.61ms Time] [2021-11-13 01:30:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-11-13 01:30:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 7927. [2021-11-13 01:30:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7927 states, 6018 states have (on average 1.5937188434695913) internal successors, (9591), 6276 states have internal predecessors, (9591), 1614 states have call successors, (1614), 260 states have call predecessors, (1614), 294 states have return successors, (2296), 1546 states have call predecessors, (2296), 1600 states have call successors, (2296) [2021-11-13 01:30:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7927 states to 7927 states and 13501 transitions. [2021-11-13 01:30:58,420 INFO L78 Accepts]: Start accepts. Automaton has 7927 states and 13501 transitions. Word has length 138 [2021-11-13 01:30:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:58,421 INFO L470 AbstractCegarLoop]: Abstraction has 7927 states and 13501 transitions. [2021-11-13 01:30:58,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:30:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7927 states and 13501 transitions. [2021-11-13 01:30:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 01:30:58,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:58,426 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:30:58,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-13 01:30:58,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:58,642 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:58,643 INFO L85 PathProgramCache]: Analyzing trace with hash -394492542, now seen corresponding path program 1 times [2021-11-13 01:30:58,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:58,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919655839] [2021-11-13 01:30:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:58,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:58,644 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:58,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:30:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:30:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:30:59,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:30:59,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919655839] [2021-11-13 01:30:59,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919655839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:59,902 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:59,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:30:59,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017417558] [2021-11-13 01:30:59,902 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:59,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:30:59,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:30:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:30:59,904 INFO L87 Difference]: Start difference. First operand 7927 states and 13501 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:01,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:03,855 INFO L93 Difference]: Finished difference Result 21529 states and 38248 transitions. [2021-11-13 01:31:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 139 [2021-11-13 01:31:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:03,950 INFO L225 Difference]: With dead ends: 21529 [2021-11-13 01:31:03,950 INFO L226 Difference]: Without dead ends: 13663 [2021-11-13 01:31:04,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:04,007 INFO L933 BasicCegarLoop]: 1780 mSDtfsCounter, 1704 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3045.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.53ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3220.86ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:04,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 3156 Invalid, 449 Unknown, 0 Unchecked, 9.53ms Time], IncrementalHoareTripleChecker [17 Valid, 431 Invalid, 1 Unknown, 0 Unchecked, 3220.86ms Time] [2021-11-13 01:31:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13663 states. [2021-11-13 01:31:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13663 to 13659. [2021-11-13 01:31:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13659 states, 10316 states have (on average 1.5846258239627762) internal successors, (16347), 10780 states have internal predecessors, (16347), 2840 states have call successors, (2840), 440 states have call predecessors, (2840), 502 states have return successors, (4461), 2746 states have call predecessors, (4461), 2818 states have call successors, (4461) [2021-11-13 01:31:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 23648 transitions. [2021-11-13 01:31:05,136 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 23648 transitions. Word has length 139 [2021-11-13 01:31:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:05,137 INFO L470 AbstractCegarLoop]: Abstraction has 13659 states and 23648 transitions. [2021-11-13 01:31:05,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 23648 transitions. [2021-11-13 01:31:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 01:31:05,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:05,143 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:31:05,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:05,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:05,359 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:05,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1994582036, now seen corresponding path program 1 times [2021-11-13 01:31:05,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:05,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164211126] [2021-11-13 01:31:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:05,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:05,363 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:05,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:31:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:06,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:31:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:31:06,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:31:06,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:06,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164211126] [2021-11-13 01:31:06,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164211126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:06,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:06,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:31:06,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069123273] [2021-11-13 01:31:06,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:06,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:06,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:06,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:06,762 INFO L87 Difference]: Start difference. First operand 13659 states and 23648 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:08,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:11,549 INFO L93 Difference]: Finished difference Result 38745 states and 70830 transitions. [2021-11-13 01:31:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 140 [2021-11-13 01:31:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:11,827 INFO L225 Difference]: With dead ends: 38745 [2021-11-13 01:31:11,827 INFO L226 Difference]: Without dead ends: 25147 [2021-11-13 01:31:11,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:11,957 INFO L933 BasicCegarLoop]: 1789 mSDtfsCounter, 1712 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2989.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.95ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3172.22ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:11,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 3172 Invalid, 451 Unknown, 0 Unchecked, 8.95ms Time], IncrementalHoareTripleChecker [17 Valid, 433 Invalid, 1 Unknown, 0 Unchecked, 3172.22ms Time] [2021-11-13 01:31:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25147 states. [2021-11-13 01:31:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25147 to 25143. [2021-11-13 01:31:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25143 states, 18928 states have (on average 1.577187235841082) internal successors, (29853), 19804 states have internal predecessors, (29853), 5296 states have call successors, (5296), 800 states have call predecessors, (5296), 918 states have return successors, (9462), 5150 states have call predecessors, (9462), 5258 states have call successors, (9462) [2021-11-13 01:31:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25143 states to 25143 states and 44611 transitions. [2021-11-13 01:31:14,334 INFO L78 Accepts]: Start accepts. Automaton has 25143 states and 44611 transitions. Word has length 140 [2021-11-13 01:31:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:14,334 INFO L470 AbstractCegarLoop]: Abstraction has 25143 states and 44611 transitions. [2021-11-13 01:31:14,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 25143 states and 44611 transitions. [2021-11-13 01:31:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 01:31:14,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:14,341 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:31:14,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:14,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:14,555 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1838749277, now seen corresponding path program 1 times [2021-11-13 01:31:14,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:14,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738718918] [2021-11-13 01:31:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:14,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:14,557 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:31:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:31:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:31:15,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:31:15,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:15,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738718918] [2021-11-13 01:31:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738718918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:15,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:15,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:31:15,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974901812] [2021-11-13 01:31:15,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:15,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:15,841 INFO L87 Difference]: Start difference. First operand 25143 states and 44611 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:17,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:22,324 INFO L93 Difference]: Finished difference Result 73217 states and 140186 transitions. [2021-11-13 01:31:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 141 [2021-11-13 01:31:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:22,690 INFO L225 Difference]: With dead ends: 73217 [2021-11-13 01:31:22,690 INFO L226 Difference]: Without dead ends: 48135 [2021-11-13 01:31:22,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:22,994 INFO L933 BasicCegarLoop]: 1798 mSDtfsCounter, 1720 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2920.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.04ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3081.77ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:22,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 3188 Invalid, 453 Unknown, 0 Unchecked, 9.04ms Time], IncrementalHoareTripleChecker [17 Valid, 435 Invalid, 1 Unknown, 0 Unchecked, 3081.77ms Time] [2021-11-13 01:31:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48135 states. [2021-11-13 01:31:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48135 to 48131. [2021-11-13 01:31:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48131 states, 36168 states have (on average 1.5705319619553195) internal successors, (56803), 37868 states have internal predecessors, (56803), 10212 states have call successors, (10212), 1520 states have call predecessors, (10212), 1750 states have return successors, (21857), 9962 states have call predecessors, (21857), 10142 states have call successors, (21857) [2021-11-13 01:31:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48131 states to 48131 states and 88872 transitions. [2021-11-13 01:31:27,869 INFO L78 Accepts]: Start accepts. Automaton has 48131 states and 88872 transitions. Word has length 141 [2021-11-13 01:31:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:27,870 INFO L470 AbstractCegarLoop]: Abstraction has 48131 states and 88872 transitions. [2021-11-13 01:31:27,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 48131 states and 88872 transitions. [2021-11-13 01:31:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:31:27,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:27,877 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:31:27,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:28,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:28,087 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:28,087 INFO L85 PathProgramCache]: Analyzing trace with hash 100200399, now seen corresponding path program 1 times [2021-11-13 01:31:28,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:28,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215540541] [2021-11-13 01:31:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:28,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:28,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:28,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:31:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:31:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:31:29,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:31:29,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:29,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215540541] [2021-11-13 01:31:29,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215540541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:29,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:29,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:31:29,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211414155] [2021-11-13 01:31:29,365 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:29,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:29,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:29,367 INFO L87 Difference]: Start difference. First operand 48131 states and 88872 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:31,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:41,653 INFO L93 Difference]: Finished difference Result 142201 states and 294556 transitions. [2021-11-13 01:31:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 142 [2021-11-13 01:31:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:42,360 INFO L225 Difference]: With dead ends: 142201 [2021-11-13 01:31:42,360 INFO L226 Difference]: Without dead ends: 94131 [2021-11-13 01:31:43,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:43,438 INFO L933 BasicCegarLoop]: 1807 mSDtfsCounter, 1728 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3132.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 3204 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.65ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3315.21ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:43,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 3204 Invalid, 455 Unknown, 0 Unchecked, 9.65ms Time], IncrementalHoareTripleChecker [17 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 3315.21ms Time] [2021-11-13 01:31:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94131 states. [2021-11-13 01:31:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94131 to 94127. [2021-11-13 01:31:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94127 states, 70664 states have (on average 1.5641486471187591) internal successors, (110529), 74012 states have internal predecessors, (110529), 20048 states have call successors, (20048), 2960 states have call predecessors, (20048), 3414 states have return successors, (55652), 19590 states have call predecessors, (55652), 19914 states have call successors, (55652) [2021-11-13 01:31:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94127 states to 94127 states and 186229 transitions. [2021-11-13 01:31:52,654 INFO L78 Accepts]: Start accepts. Automaton has 94127 states and 186229 transitions. Word has length 142 [2021-11-13 01:31:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:52,654 INFO L470 AbstractCegarLoop]: Abstraction has 94127 states and 186229 transitions. [2021-11-13 01:31:52,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:31:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 94127 states and 186229 transitions. [2021-11-13 01:31:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:31:52,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:52,659 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:31:52,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-13 01:31:52,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:52,875 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash -380879859, now seen corresponding path program 1 times [2021-11-13 01:31:52,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:52,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158312315] [2021-11-13 01:31:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:52,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:52,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:52,877 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:52,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584807a4-af9e-44b9-b017-db286ffad034/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 01:31:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:31:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:31:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:31:54,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:54,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158312315] [2021-11-13 01:31:54,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158312315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:54,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:54,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 11 [2021-11-13 01:31:54,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946040395] [2021-11-13 01:31:54,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:54,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:31:54,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:54,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:31:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:31:54,589 INFO L87 Difference]: Start difference. First operand 94127 states and 186229 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 5 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-13 01:31:56,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:58,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:00,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:02,642 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []