./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.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_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/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_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/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_e753937c-4649-4217-85fd-7ebe3678bde0/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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:17:03,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:17:03,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:17:03,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:17:03,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:17:03,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:17:03,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:17:03,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:17:03,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:17:03,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:17:03,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:17:03,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:17:03,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:17:03,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:17:03,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:17:03,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:17:03,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:17:03,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:17:03,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:17:04,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:17:04,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:17:04,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:17:04,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:17:04,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:17:04,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:17:04,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:17:04,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:17:04,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:17:04,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:17:04,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:17:04,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:17:04,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:17:04,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:17:04,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:17:04,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:17:04,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:17:04,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:17:04,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:17:04,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:17:04,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:17:04,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:17:04,031 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:17:04,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:17:04,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:17:04,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:17:04,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:17:04,080 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:17:04,081 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:17:04,081 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:17:04,081 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:17:04,081 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:17:04,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:17:04,083 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:17:04,083 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:17:04,083 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:17:04,084 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:17:04,084 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:17:04,084 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:17:04,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:17:04,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:17:04,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:17:04,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:17:04,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:17:04,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:17:04,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:17:04,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:17:04,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:17:04,087 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:17:04,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:17:04,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:17:04,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:17:04,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:17:04,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:17:04,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:04,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:17:04,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:17:04,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:17:04,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:17:04,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:17:04,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:17:04,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:17:04,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:17:04,093 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_e753937c-4649-4217-85fd-7ebe3678bde0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-12 22:17:04,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:17:04,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:17:04,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:17:04,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:17:04,374 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:17:04,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-12 22:17:04,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/c02351166/02915a4432eb423285f2f97095e8b5dd/FLAGb5e755216 [2021-11-12 22:17:05,031 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:17:05,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-12 22:17:05,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/c02351166/02915a4432eb423285f2f97095e8b5dd/FLAGb5e755216 [2021-11-12 22:17:05,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/c02351166/02915a4432eb423285f2f97095e8b5dd [2021-11-12 22:17:05,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:17:05,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:17:05,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:05,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:17:05,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:17:05,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d9daff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05, skipping insertion in model container [2021-11-12 22:17:05,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:17:05,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:05,969 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_e753937c-4649-4217-85fd-7ebe3678bde0/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-12 22:17:05,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:05,993 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:17:05,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@288b5dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05, skipping insertion in model container [2021-11-12 22:17:05,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:05,995 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:17:05,997 INFO L158 Benchmark]: Toolchain (without parser) took 714.88ms. Allocated memory is still 111.1MB. Free memory was 66.3MB in the beginning and 72.4MB in the end (delta: -6.1MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-11-12 22:17:05,998 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 111.1MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:17:05,999 INFO L158 Benchmark]: CACSL2BoogieTranslator took 712.35ms. Allocated memory is still 111.1MB. Free memory was 66.1MB in the beginning and 72.4MB in the end (delta: -6.3MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-11-12 22:17:06,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 111.1MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 712.35ms. Allocated memory is still 111.1MB. Free memory was 66.1MB in the beginning and 72.4MB in the end (delta: -6.3MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: 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_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/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_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/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_e753937c-4649-4217-85fd-7ebe3678bde0/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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:17:08,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:17:08,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:17:08,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:17:08,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:17:08,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:17:08,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:17:08,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:17:08,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:17:08,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:17:08,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:17:08,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:17:08,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:17:08,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:17:08,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:17:08,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:17:08,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:17:08,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:17:08,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:17:08,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:17:08,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:17:08,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:17:08,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:17:08,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:17:08,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:17:08,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:17:08,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:17:08,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:17:08,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:17:08,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:17:08,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:17:08,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:17:08,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:17:08,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:17:08,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:17:08,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:17:08,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:17:08,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:17:08,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:17:08,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:17:08,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:17:08,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:17:08,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:17:08,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:17:08,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:17:08,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:17:08,404 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:17:08,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:17:08,404 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:17:08,404 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:17:08,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:17:08,405 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:17:08,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:17:08,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:17:08,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:17:08,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:17:08,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:17:08,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:17:08,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:17:08,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:17:08,409 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:17:08,409 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:17:08,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:17:08,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:17:08,410 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:17:08,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:17:08,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:17:08,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:17:08,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:17:08,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:08,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:17:08,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:17:08,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:17:08,412 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:17:08,412 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:08,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:17:08,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:17:08,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:17:08,413 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_e753937c-4649-4217-85fd-7ebe3678bde0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-12 22:17:08,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:17:08,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:17:08,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:17:08,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:17:08,802 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:17:08,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-12 22:17:08,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/957b3bf0c/db4213be4dbe4855b92297331e5c197d/FLAG3932909e1 [2021-11-12 22:17:09,671 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:17:09,671 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-12 22:17:09,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/957b3bf0c/db4213be4dbe4855b92297331e5c197d/FLAG3932909e1 [2021-11-12 22:17:09,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/data/957b3bf0c/db4213be4dbe4855b92297331e5c197d [2021-11-12 22:17:09,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:17:09,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:17:09,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:09,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:17:09,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:17:09,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:09" (1/1) ... [2021-11-12 22:17:09,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6911f258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:09, skipping insertion in model container [2021-11-12 22:17:09,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:09" (1/1) ... [2021-11-12 22:17:09,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:17:10,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:10,565 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_e753937c-4649-4217-85fd-7ebe3678bde0/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-12 22:17:10,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:10,591 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:17:10,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:10,784 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_e753937c-4649-4217-85fd-7ebe3678bde0/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-12 22:17:10,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:10,795 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:17:10,894 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_e753937c-4649-4217-85fd-7ebe3678bde0/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-12 22:17:10,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:10,927 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:17:10,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10 WrapperNode [2021-11-12 22:17:10,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:10,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:17:10,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:17:10,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:17:10,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:10,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:17:11,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:17:11,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:17:11,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:17:11,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:17:11,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:17:11,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:17:11,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:17:11,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (1/1) ... [2021-11-12 22:17:11,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:11,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:17:11,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:17:11,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:17:11,243 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:17:11,244 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:17:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:17:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:17:11,244 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:17:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:17:11,245 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:17:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:17:11,245 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:17:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:17:11,245 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:17:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:17:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:17:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:17:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:17:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:17:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:17:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:17:11,247 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:17:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:17:11,247 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:17:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:17:11,247 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:17:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:17:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:17:11,248 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:17:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:17:11,248 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:17:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:17:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:17:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:17:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:17:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:17:11,250 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:17:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:17:11,250 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:17:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:17:11,250 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:17:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-12 22:17:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-12 22:17:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:17:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:17:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:17:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:17:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:17:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:17:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:17:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:17:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:17:11,252 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:17:15,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:17:15,015 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:17:15,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:17:15 BoogieIcfgContainer [2021-11-12 22:17:15,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:17:15,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:17:15,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:17:15,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:17:15,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:17:09" (1/3) ... [2021-11-12 22:17:15,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be88d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:17:15, skipping insertion in model container [2021-11-12 22:17:15,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:10" (2/3) ... [2021-11-12 22:17:15,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be88d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:17:15, skipping insertion in model container [2021-11-12 22:17:15,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:17:15" (3/3) ... [2021-11-12 22:17:15,025 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2021-11-12 22:17:15,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:17:15,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:17:15,100 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:17:15,114 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:17:15,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:17:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 545 states, 429 states have (on average 1.6993006993006994) internal successors, (729), 450 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:17:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:17:15,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:15,207 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:15,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:15,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1289670013, now seen corresponding path program 1 times [2021-11-12 22:17:15,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:15,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235418320] [2021-11-12 22:17:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:15,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:15,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:15,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:15,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:17:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:17:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:16,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:16,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235418320] [2021-11-12 22:17:16,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235418320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:16,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:16,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:17:16,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440448215] [2021-11-12 22:17:16,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:16,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:17:16,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:17:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:17:16,500 INFO L87 Difference]: Start difference. First operand has 545 states, 429 states have (on average 1.6993006993006994) internal successors, (729), 450 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:17:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:16,594 INFO L93 Difference]: Finished difference Result 566 states and 941 transitions. [2021-11-12 22:17:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:17:16,596 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2021-11-12 22:17:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:16,624 INFO L225 Difference]: With dead ends: 566 [2021-11-12 22:17:16,625 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 22:17:16,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:17:16,633 INFO L933 BasicCegarLoop]: 902 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, 902 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:16,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 10.11ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:17:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 22:17:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 22:17:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6973995271867612) internal successors, (718), 442 states have internal predecessors, (718), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:17:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 895 transitions. [2021-11-12 22:17:16,769 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 895 transitions. Word has length 104 [2021-11-12 22:17:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:16,771 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 895 transitions. [2021-11-12 22:17:16,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:17:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 895 transitions. [2021-11-12 22:17:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:17:16,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:16,778 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:16,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:17,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:17,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -791622441, now seen corresponding path program 1 times [2021-11-12 22:17:17,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:17,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464241490] [2021-11-12 22:17:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:17,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:17,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:17,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:17:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:17,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:17:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:17,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:18,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:18,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464241490] [2021-11-12 22:17:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464241490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:18,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:18,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:17:18,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002401383] [2021-11-12 22:17:18,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:18,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:17:18,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:17:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:17:18,110 INFO L87 Difference]: Start difference. First operand 537 states and 895 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:17:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:18,237 INFO L93 Difference]: Finished difference Result 1058 states and 1768 transitions. [2021-11-12 22:17:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:17:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 106 [2021-11-12 22:17:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:18,244 INFO L225 Difference]: With dead ends: 1058 [2021-11-12 22:17:18,244 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 22:17:18,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:17:18,250 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 30 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.19ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:18,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2642 Invalid, 41 Unknown, 0 Unchecked, 13.19ms Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 36.74ms Time] [2021-11-12 22:17:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 22:17:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 22:17:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6832151300236406) internal successors, (712), 442 states have internal predecessors, (712), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:17:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 889 transitions. [2021-11-12 22:17:18,306 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 889 transitions. Word has length 106 [2021-11-12 22:17:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:18,307 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 889 transitions. [2021-11-12 22:17:18,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:17:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 889 transitions. [2021-11-12 22:17:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:17:18,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:18,313 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:18,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:17:18,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:18,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1786056527, now seen corresponding path program 1 times [2021-11-12 22:17:18,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:18,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31022283] [2021-11-12 22:17:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:18,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:18,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:17:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:19,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:19,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:19,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31022283] [2021-11-12 22:17:19,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31022283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:19,650 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:19,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:17:19,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659967154] [2021-11-12 22:17:19,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:19,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:17:19,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:17:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:17:19,653 INFO L87 Difference]: Start difference. First operand 537 states and 889 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:19,841 INFO L93 Difference]: Finished difference Result 1016 states and 1685 transitions. [2021-11-12 22:17:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:17:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 111 [2021-11-12 22:17:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:19,849 INFO L225 Difference]: With dead ends: 1016 [2021-11-12 22:17:19,850 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 22:17:19,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:17:19,857 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 118 mSDsluCounter, 4287 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 5163 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:19,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 5163 Invalid, 69 Unknown, 0 Unchecked, 22.53ms Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 88.71ms Time] [2021-11-12 22:17:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 22:17:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 22:17:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.6762589928057554) internal successors, (699), 436 states have internal predecessors, (699), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:17:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 876 transitions. [2021-11-12 22:17:19,908 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 876 transitions. Word has length 111 [2021-11-12 22:17:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:19,911 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 876 transitions. [2021-11-12 22:17:19,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 876 transitions. [2021-11-12 22:17:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:17:19,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:19,919 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:20,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:20,146 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash -209131246, now seen corresponding path program 1 times [2021-11-12 22:17:20,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:20,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084417347] [2021-11-12 22:17:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:20,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:20,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:20,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:17:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:17:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:20,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:21,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:21,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084417347] [2021-11-12 22:17:21,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084417347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:21,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:21,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:17:21,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883253487] [2021-11-12 22:17:21,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:21,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:17:21,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:21,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:17:21,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:17:21,211 INFO L87 Difference]: Start difference. First operand 531 states and 876 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:17:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:21,413 INFO L93 Difference]: Finished difference Result 1019 states and 1686 transitions. [2021-11-12 22:17:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:17:21,414 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2021-11-12 22:17:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:21,420 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 22:17:21,420 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 22:17:21,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:17:21,432 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 121 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.04ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:21,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 3271 Invalid, 126 Unknown, 0 Unchecked, 11.04ms Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 124.92ms Time] [2021-11-12 22:17:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 22:17:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 22:17:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 417 states have (on average 1.618705035971223) internal successors, (675), 436 states have internal predecessors, (675), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:17:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 852 transitions. [2021-11-12 22:17:21,462 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 852 transitions. Word has length 112 [2021-11-12 22:17:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:21,463 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 852 transitions. [2021-11-12 22:17:21,464 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:17:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 852 transitions. [2021-11-12 22:17:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:17:21,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:21,468 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:21,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:21,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:21,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash 936457175, now seen corresponding path program 1 times [2021-11-12 22:17:21,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:21,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703076283] [2021-11-12 22:17:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:21,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:21,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:21,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:21,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:17:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:22,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:22,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:22,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:22,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703076283] [2021-11-12 22:17:22,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703076283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:22,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:22,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:17:22,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557192312] [2021-11-12 22:17:22,956 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:17:22,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:17:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:17:22,961 INFO L87 Difference]: Start difference. First operand 531 states and 852 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:17:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:23,109 INFO L93 Difference]: Finished difference Result 1010 states and 1648 transitions. [2021-11-12 22:17:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:17:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 114 [2021-11-12 22:17:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:23,116 INFO L225 Difference]: With dead ends: 1010 [2021-11-12 22:17:23,116 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 22:17:23,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:23,122 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 89 mSDsluCounter, 4939 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5779 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:23,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5779 Invalid, 60 Unknown, 0 Unchecked, 12.32ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 87.02ms Time] [2021-11-12 22:17:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 22:17:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-12 22:17:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6414141414141414) internal successors, (650), 415 states have internal predecessors, (650), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:17:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 827 transitions. [2021-11-12 22:17:23,149 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 827 transitions. Word has length 114 [2021-11-12 22:17:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:23,150 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 827 transitions. [2021-11-12 22:17:23,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:17:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 827 transitions. [2021-11-12 22:17:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:17:23,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:23,157 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:23,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:23,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:23,370 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1638240868, now seen corresponding path program 1 times [2021-11-12 22:17:23,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:23,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922842555] [2021-11-12 22:17:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:23,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:23,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:23,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:17:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:17:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:24,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:24,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:24,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922842555] [2021-11-12 22:17:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922842555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:24,681 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:24,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:17:24,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219063189] [2021-11-12 22:17:24,682 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:17:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:17:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:17:24,683 INFO L87 Difference]: Start difference. First operand 510 states and 827 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:24,865 INFO L93 Difference]: Finished difference Result 983 states and 1612 transitions. [2021-11-12 22:17:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:24,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 22:17:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:24,872 INFO L225 Difference]: With dead ends: 983 [2021-11-12 22:17:24,872 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 22:17:24,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:17:24,877 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 44 mSDsluCounter, 5655 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6467 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:24,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 6467 Invalid, 95 Unknown, 0 Unchecked, 13.57ms Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 95.43ms Time] [2021-11-12 22:17:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 22:17:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-12 22:17:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 396 states have (on average 1.6388888888888888) internal successors, (649), 415 states have internal predecessors, (649), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:17:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 826 transitions. [2021-11-12 22:17:24,900 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 826 transitions. Word has length 117 [2021-11-12 22:17:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:24,902 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 826 transitions. [2021-11-12 22:17:24,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 826 transitions. [2021-11-12 22:17:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:17:24,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:24,908 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:24,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:25,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:25,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:25,130 INFO L85 PathProgramCache]: Analyzing trace with hash -365765455, now seen corresponding path program 1 times [2021-11-12 22:17:25,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:25,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454348368] [2021-11-12 22:17:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:25,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:25,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:25,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:25,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:17:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:17:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:25,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:26,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:26,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454348368] [2021-11-12 22:17:26,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454348368] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:26,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:26,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:17:26,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594228741] [2021-11-12 22:17:26,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:26,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:26,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:26,482 INFO L87 Difference]: Start difference. First operand 510 states and 826 transitions. Second operand has 5 states, 5 states have (on average 17.0) 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, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:28,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:30,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:31,372 INFO L93 Difference]: Finished difference Result 979 states and 1629 transitions. [2021-11-12 22:17:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:17:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) 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, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2021-11-12 22:17:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:31,378 INFO L225 Difference]: With dead ends: 979 [2021-11-12 22:17:31,378 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 22:17:31,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:17:31,382 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 762 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4703.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.03ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4811.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:31,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 2063 Invalid, 417 Unknown, 0 Unchecked, 14.03ms Time], IncrementalHoareTripleChecker [16 Valid, 399 Invalid, 2 Unknown, 0 Unchecked, 4811.33ms Time] [2021-11-12 22:17:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 22:17:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-12 22:17:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6340852130325814) internal successors, (652), 418 states have internal predecessors, (652), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-12 22:17:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 830 transitions. [2021-11-12 22:17:31,431 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 830 transitions. Word has length 118 [2021-11-12 22:17:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:31,431 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 830 transitions. [2021-11-12 22:17:31,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) 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, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 830 transitions. [2021-11-12 22:17:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:17:31,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:31,436 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:31,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:31,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:31,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1709795483, now seen corresponding path program 1 times [2021-11-12 22:17:31,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:31,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361820096] [2021-11-12 22:17:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:31,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:31,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:31,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:17:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:32,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:17:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:32,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:33,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:33,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361820096] [2021-11-12 22:17:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361820096] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:33,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:33,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:17:33,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80741811] [2021-11-12 22:17:33,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:33,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:33,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:33,014 INFO L87 Difference]: Start difference. First operand 514 states and 830 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:35,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:37,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:37,915 INFO L93 Difference]: Finished difference Result 988 states and 1636 transitions. [2021-11-12 22:17:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:17:37,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-12 22:17:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:37,921 INFO L225 Difference]: With dead ends: 988 [2021-11-12 22:17:37,921 INFO L226 Difference]: Without dead ends: 519 [2021-11-12 22:17:37,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:17:37,925 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 762 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4700.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.40ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4830.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:37,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 2064 Invalid, 419 Unknown, 0 Unchecked, 8.40ms Time], IncrementalHoareTripleChecker [14 Valid, 403 Invalid, 2 Unknown, 0 Unchecked, 4830.96ms Time] [2021-11-12 22:17:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-12 22:17:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-12 22:17:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.6277915632754343) internal successors, (656), 422 states have internal predecessors, (656), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (88), 84 states have call predecessors, (88), 86 states have call successors, (88) [2021-11-12 22:17:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 835 transitions. [2021-11-12 22:17:37,952 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 835 transitions. Word has length 120 [2021-11-12 22:17:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:37,952 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 835 transitions. [2021-11-12 22:17:37,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 835 transitions. [2021-11-12 22:17:37,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:17:37,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:37,957 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:37,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:38,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:38,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash 273910961, now seen corresponding path program 1 times [2021-11-12 22:17:38,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:38,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096083144] [2021-11-12 22:17:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:38,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:38,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:38,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:17:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:38,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:17:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:39,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:39,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:39,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096083144] [2021-11-12 22:17:39,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096083144] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:39,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:39,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:17:39,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999878198] [2021-11-12 22:17:39,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:39,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:39,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:39,634 INFO L87 Difference]: Start difference. First operand 519 states and 835 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:41,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:43,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:44,450 INFO L93 Difference]: Finished difference Result 999 states and 1645 transitions. [2021-11-12 22:17:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:17:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2021-11-12 22:17:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:44,455 INFO L225 Difference]: With dead ends: 999 [2021-11-12 22:17:44,455 INFO L226 Difference]: Without dead ends: 525 [2021-11-12 22:17:44,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:17:44,459 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 763 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4646.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.18ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4755.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:44,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 2064 Invalid, 418 Unknown, 0 Unchecked, 7.18ms Time], IncrementalHoareTripleChecker [12 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 4755.14ms Time] [2021-11-12 22:17:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-12 22:17:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-12 22:17:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6200980392156863) internal successors, (661), 427 states have internal predecessors, (661), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (89), 84 states have call predecessors, (89), 86 states have call successors, (89) [2021-11-12 22:17:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 841 transitions. [2021-11-12 22:17:44,485 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 841 transitions. Word has length 122 [2021-11-12 22:17:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 841 transitions. [2021-11-12 22:17:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 841 transitions. [2021-11-12 22:17:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:17:44,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:44,491 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:17:44,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:44,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:44,708 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash 965977491, now seen corresponding path program 1 times [2021-11-12 22:17:44,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:44,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51503167] [2021-11-12 22:17:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:44,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:44,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:44,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:17:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:17:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:45,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:17:46,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:46,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51503167] [2021-11-12 22:17:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51503167] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:46,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:17:46,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66283885] [2021-11-12 22:17:46,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:46,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:46,056 INFO L87 Difference]: Start difference. First operand 525 states and 841 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:48,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:50,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:50,884 INFO L93 Difference]: Finished difference Result 1012 states and 1656 transitions. [2021-11-12 22:17:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:17:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-12 22:17:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:50,890 INFO L225 Difference]: With dead ends: 1012 [2021-11-12 22:17:50,890 INFO L226 Difference]: Without dead ends: 532 [2021-11-12 22:17:50,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:17:50,894 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 764 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4644.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.86ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4759.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:50,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 2064 Invalid, 417 Unknown, 0 Unchecked, 9.86ms Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 4759.02ms Time] [2021-11-12 22:17:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-12 22:17:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-11-12 22:17:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 414 states have (on average 1.6111111111111112) internal successors, (667), 433 states have internal predecessors, (667), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-11-12 22:17:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 848 transitions. [2021-11-12 22:17:50,920 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 848 transitions. Word has length 124 [2021-11-12 22:17:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:50,921 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 848 transitions. [2021-11-12 22:17:50,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:17:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 848 transitions. [2021-11-12 22:17:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:17:50,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:50,926 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] [2021-11-12 22:17:50,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:51,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:51,144 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1102015153, now seen corresponding path program 1 times [2021-11-12 22:17:51,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:51,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633727241] [2021-11-12 22:17:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:51,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:51,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:51,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:17:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:17:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:17:52,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:17:53,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:53,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633727241] [2021-11-12 22:17:53,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633727241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:17:53,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [846429733] [2021-11-12 22:17:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:53,213 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:17:53,214 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:17:53,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:17:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:17:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:17:53,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:17:54,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [846429733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:54,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:17:54,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:17:54,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643467340] [2021-11-12 22:17:54,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:54,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:17:54,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:17:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:17:54,100 INFO L87 Difference]: Start difference. First operand 532 states and 848 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:17:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:54,178 INFO L93 Difference]: Finished difference Result 1497 states and 2443 transitions. [2021-11-12 22:17:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:17:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 126 [2021-11-12 22:17:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:54,189 INFO L225 Difference]: With dead ends: 1497 [2021-11-12 22:17:54,189 INFO L226 Difference]: Without dead ends: 1010 [2021-11-12 22:17:54,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:17:54,193 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 810 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:54,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1773 Invalid, 10 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 34.07ms Time] [2021-11-12 22:17:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-11-12 22:17:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1008. [2021-11-12 22:17:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 786 states have (on average 1.6323155216284988) internal successors, (1283), 819 states have internal predecessors, (1283), 172 states have call successors, (172), 49 states have call predecessors, (172), 49 states have return successors, (185), 165 states have call predecessors, (185), 167 states have call successors, (185) [2021-11-12 22:17:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1640 transitions. [2021-11-12 22:17:54,246 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1640 transitions. Word has length 126 [2021-11-12 22:17:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:54,247 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1640 transitions. [2021-11-12 22:17:54,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:17:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1640 transitions. [2021-11-12 22:17:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:17:54,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:54,251 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] [2021-11-12 22:17:54,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:54,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:54,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:54,670 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -197395859, now seen corresponding path program 1 times [2021-11-12 22:17:54,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:54,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920091382] [2021-11-12 22:17:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:54,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:54,672 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:54,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:17:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:55,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:17:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:17:55,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:17:56,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:56,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920091382] [2021-11-12 22:17:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920091382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:17:56,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [391208661] [2021-11-12 22:17:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:56,523 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:17:56,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:17:56,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:17:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:56,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:17:56,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:17:57,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:17:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [391208661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:57,324 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:17:57,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:17:57,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602870901] [2021-11-12 22:17:57,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:57,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:17:57,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:17:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:17:57,326 INFO L87 Difference]: Start difference. First operand 1008 states and 1640 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:17:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:57,460 INFO L93 Difference]: Finished difference Result 2927 states and 4837 transitions. [2021-11-12 22:17:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:17:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2021-11-12 22:17:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:57,478 INFO L225 Difference]: With dead ends: 2927 [2021-11-12 22:17:57,478 INFO L226 Difference]: Without dead ends: 1964 [2021-11-12 22:17:57,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:17:57,484 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 809 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:57,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1745 Invalid, 10 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 30.86ms Time] [2021-11-12 22:17:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-11-12 22:17:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1961. [2021-11-12 22:17:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1531 states have (on average 1.643370346178968) internal successors, (2516), 1592 states have internal predecessors, (2516), 334 states have call successors, (334), 93 states have call predecessors, (334), 95 states have return successors, (387), 327 states have call predecessors, (387), 329 states have call successors, (387) [2021-11-12 22:17:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3237 transitions. [2021-11-12 22:17:57,579 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3237 transitions. Word has length 127 [2021-11-12 22:17:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:57,580 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3237 transitions. [2021-11-12 22:17:57,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:17:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3237 transitions. [2021-11-12 22:17:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:17:57,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:57,585 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, 1] [2021-11-12 22:17:57,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:57,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:57,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:57,989 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1824427661, now seen corresponding path program 1 times [2021-11-12 22:17:57,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:57,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741203254] [2021-11-12 22:17:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:57,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:57,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:57,991 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:57,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:17:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:17:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:17:58,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:17:59,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:59,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741203254] [2021-11-12 22:17:59,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741203254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:17:59,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [743740920] [2021-11-12 22:17:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:59,839 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:17:59,841 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:17:59,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:18:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:18:00,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:18:00,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:18:00,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [743740920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:00,685 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:18:00,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:18:00,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873840542] [2021-11-12 22:18:00,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:00,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:18:00,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:00,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:18:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:18:00,687 INFO L87 Difference]: Start difference. First operand 1961 states and 3237 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:18:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:00,861 INFO L93 Difference]: Finished difference Result 5788 states and 9679 transitions. [2021-11-12 22:18:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:18:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 128 [2021-11-12 22:18:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:00,896 INFO L225 Difference]: With dead ends: 5788 [2021-11-12 22:18:00,897 INFO L226 Difference]: Without dead ends: 3872 [2021-11-12 22:18:00,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:18:00,912 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 808 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.94ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:00,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1748 Invalid, 10 Unknown, 0 Unchecked, 3.94ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 30.18ms Time] [2021-11-12 22:18:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-11-12 22:18:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 3868. [2021-11-12 22:18:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3022 states have (on average 1.6485771012574455) internal successors, (4982), 3139 states have internal predecessors, (4982), 658 states have call successors, (658), 181 states have call predecessors, (658), 187 states have return successors, (827), 651 states have call predecessors, (827), 653 states have call successors, (827) [2021-11-12 22:18:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 6467 transitions. [2021-11-12 22:18:01,164 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 6467 transitions. Word has length 128 [2021-11-12 22:18:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:01,164 INFO L470 AbstractCegarLoop]: Abstraction has 3868 states and 6467 transitions. [2021-11-12 22:18:01,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:18:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 6467 transitions. [2021-11-12 22:18:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:18:01,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:01,170 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, 1, 1] [2021-11-12 22:18:01,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:01,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:01,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:01,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -722802065, now seen corresponding path program 1 times [2021-11-12 22:18:01,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:01,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569946852] [2021-11-12 22:18:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:01,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:01,601 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:01,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:18:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:18:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:18:02,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:18:03,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:03,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569946852] [2021-11-12 22:18:03,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569946852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:18:03,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1627058938] [2021-11-12 22:18:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:03,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:18:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:18:03,326 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:18:03,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:18:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:03,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:18:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:18:03,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:18:04,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1627058938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:04,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:18:04,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:18:04,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069081140] [2021-11-12 22:18:04,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:04,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:18:04,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:18:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:18:04,143 INFO L87 Difference]: Start difference. First operand 3868 states and 6467 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:18:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:04,435 INFO L93 Difference]: Finished difference Result 11511 states and 19540 transitions. [2021-11-12 22:18:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:18:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2021-11-12 22:18:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:04,505 INFO L225 Difference]: With dead ends: 11511 [2021-11-12 22:18:04,505 INFO L226 Difference]: Without dead ends: 7688 [2021-11-12 22:18:04,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:18:04,532 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 807 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.83ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:04,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 1756 Invalid, 10 Unknown, 0 Unchecked, 3.83ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 40.15ms Time] [2021-11-12 22:18:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7688 states. [2021-11-12 22:18:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7688 to 7683. [2021-11-12 22:18:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 6005 states have (on average 1.650624479600333) internal successors, (9912), 6234 states have internal predecessors, (9912), 1306 states have call successors, (1306), 357 states have call predecessors, (1306), 371 states have return successors, (1827), 1299 states have call predecessors, (1827), 1301 states have call successors, (1827) [2021-11-12 22:18:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 13045 transitions. [2021-11-12 22:18:05,029 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 13045 transitions. Word has length 129 [2021-11-12 22:18:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:05,030 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 13045 transitions. [2021-11-12 22:18:05,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:18:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 13045 transitions. [2021-11-12 22:18:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:18:05,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:05,036 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, 1, 1, 1] [2021-11-12 22:18:05,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:05,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:05,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:05,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash -932143051, now seen corresponding path program 1 times [2021-11-12 22:18:05,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:05,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171869817] [2021-11-12 22:18:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:05,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:05,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:05,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:05,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:18:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:18:05,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:18:06,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:18:07,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:07,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171869817] [2021-11-12 22:18:07,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171869817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:18:07,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [530393190] [2021-11-12 22:18:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:07,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:18:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:18:07,463 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:18:07,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:18:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:18:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:18:08,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:18:08,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [530393190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:08,379 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:18:08,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:18:08,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192889045] [2021-11-12 22:18:08,380 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:08,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:18:08,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:18:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:18:08,381 INFO L87 Difference]: Start difference. First operand 7683 states and 13045 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:18:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:08,935 INFO L93 Difference]: Finished difference Result 22958 states and 39900 transitions. [2021-11-12 22:18:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:18:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 130 [2021-11-12 22:18:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:09,094 INFO L225 Difference]: With dead ends: 22958 [2021-11-12 22:18:09,095 INFO L226 Difference]: Without dead ends: 15312 [2021-11-12 22:18:09,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:18:09,142 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 805 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:09,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 1780 Invalid, 8 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 39.08ms Time] [2021-11-12 22:18:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15312 states. [2021-11-12 22:18:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15312 to 15306. [2021-11-12 22:18:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15306 states, 11965 states have (on average 1.6508148767237776) internal successors, (19752), 12418 states have internal predecessors, (19752), 2602 states have call successors, (2602), 709 states have call predecessors, (2602), 738 states have return successors, (4258), 2594 states have call predecessors, (4258), 2597 states have call successors, (4258) [2021-11-12 22:18:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15306 states to 15306 states and 26612 transitions. [2021-11-12 22:18:10,321 INFO L78 Accepts]: Start accepts. Automaton has 15306 states and 26612 transitions. Word has length 130 [2021-11-12 22:18:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 15306 states and 26612 transitions. [2021-11-12 22:18:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:18:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 15306 states and 26612 transitions. [2021-11-12 22:18:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-12 22:18:10,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:10,352 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:18:10,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:10,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:10,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:18:10,767 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 325853586, now seen corresponding path program 1 times [2021-11-12 22:18:10,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:10,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091675089] [2021-11-12 22:18:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:10,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:10,769 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:10,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:18:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:11,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:18:11,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:18:11,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:18:12,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:12,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091675089] [2021-11-12 22:18:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091675089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:12,683 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:12,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 22:18:12,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712393963] [2021-11-12 22:18:12,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:12,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:18:12,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:18:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:18:12,685 INFO L87 Difference]: Start difference. First operand 15306 states and 26612 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 12 states have internal predecessors, (142), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-12 22:18:14,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:16,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:18,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:20,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:22,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:37,035 INFO L93 Difference]: Finished difference Result 74851 states and 147224 transitions. [2021-11-12 22:18:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 22:18:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 12 states have internal predecessors, (142), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) Word has length 187 [2021-11-12 22:18:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:38,018 INFO L225 Difference]: With dead ends: 74851 [2021-11-12 22:18:38,019 INFO L226 Difference]: Without dead ends: 59590 [2021-11-12 22:18:38,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:18:38,186 INFO L933 BasicCegarLoop]: 1752 mSDtfsCounter, 7136 mSDsluCounter, 5106 mSDsCounter, 0 mSdLazyCounter, 9513 mSolverCounterSat, 2950 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19978.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7171 SdHoareTripleChecker+Valid, 6858 SdHoareTripleChecker+Invalid, 12468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 60.51ms SdHoareTripleChecker+Time, 2950 IncrementalHoareTripleChecker+Valid, 9513 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21454.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:38,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7171 Valid, 6858 Invalid, 12468 Unknown, 0 Unchecked, 60.51ms Time], IncrementalHoareTripleChecker [2950 Valid, 9513 Invalid, 5 Unknown, 0 Unchecked, 21454.53ms Time] [2021-11-12 22:18:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59590 states. [2021-11-12 22:18:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59590 to 51696. [2021-11-12 22:18:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51696 states, 39328 states have (on average 1.6330858421480878) internal successors, (64226), 41061 states have internal predecessors, (64226), 9868 states have call successors, (9868), 2118 states have call predecessors, (9868), 2499 states have return successors, (22978), 10084 states have call predecessors, (22978), 9863 states have call successors, (22978) [2021-11-12 22:18:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51696 states to 51696 states and 97072 transitions. [2021-11-12 22:18:42,561 INFO L78 Accepts]: Start accepts. Automaton has 51696 states and 97072 transitions. Word has length 187 [2021-11-12 22:18:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:42,562 INFO L470 AbstractCegarLoop]: Abstraction has 51696 states and 97072 transitions. [2021-11-12 22:18:42,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 12 states have internal predecessors, (142), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-12 22:18:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 51696 states and 97072 transitions. [2021-11-12 22:18:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:18:42,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:42,710 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:18:42,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:42,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:42,931 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash -113878969, now seen corresponding path program 1 times [2021-11-12 22:18:42,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:42,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356662953] [2021-11-12 22:18:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:42,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:42,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:42,934 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:42,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:18:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:18:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:18:43,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:18:44,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:44,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356662953] [2021-11-12 22:18:44,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356662953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:44,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:44,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:18:44,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551941444] [2021-11-12 22:18:44,645 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:44,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:18:44,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:18:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:18:44,647 INFO L87 Difference]: Start difference. First operand 51696 states and 97072 transitions. Second operand has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 22:18:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:45,950 INFO L93 Difference]: Finished difference Result 66805 states and 123355 transitions. [2021-11-12 22:18:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:18:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 194 [2021-11-12 22:18:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:46,035 INFO L225 Difference]: With dead ends: 66805 [2021-11-12 22:18:46,035 INFO L226 Difference]: Without dead ends: 15143 [2021-11-12 22:18:46,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:18:46,270 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 26 mSDsluCounter, 5596 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6401 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:46,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6401 Invalid, 76 Unknown, 0 Unchecked, 5.90ms Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 67.24ms Time] [2021-11-12 22:18:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15143 states. [2021-11-12 22:18:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15143 to 15143. [2021-11-12 22:18:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15143 states, 11866 states have (on average 1.6505140738243722) internal successors, (19585), 12319 states have internal predecessors, (19585), 2538 states have call successors, (2538), 709 states have call predecessors, (2538), 738 states have return successors, (4194), 2530 states have call predecessors, (4194), 2533 states have call successors, (4194) [2021-11-12 22:18:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15143 states to 15143 states and 26317 transitions. [2021-11-12 22:18:47,368 INFO L78 Accepts]: Start accepts. Automaton has 15143 states and 26317 transitions. Word has length 194 [2021-11-12 22:18:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:47,368 INFO L470 AbstractCegarLoop]: Abstraction has 15143 states and 26317 transitions. [2021-11-12 22:18:47,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 22:18:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 15143 states and 26317 transitions. [2021-11-12 22:18:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-12 22:18:47,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:47,384 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:18:47,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:47,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:47,598 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1506333285, now seen corresponding path program 1 times [2021-11-12 22:18:47,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:47,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518880611] [2021-11-12 22:18:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:47,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:47,601 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:47,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:18:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:18:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:18:48,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:18:49,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:49,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518880611] [2021-11-12 22:18:49,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518880611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:49,614 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:49,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-12 22:18:49,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995423520] [2021-11-12 22:18:49,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:49,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:18:49,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:18:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:18:49,620 INFO L87 Difference]: Start difference. First operand 15143 states and 26317 transitions. Second operand has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 22:18:51,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:53,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:55,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:57,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:00,611 INFO L93 Difference]: Finished difference Result 30436 states and 54000 transitions. [2021-11-12 22:19:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) Word has length 193 [2021-11-12 22:19:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:00,704 INFO L225 Difference]: With dead ends: 30436 [2021-11-12 22:19:00,704 INFO L226 Difference]: Without dead ends: 15335 [2021-11-12 22:19:00,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:19:00,776 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1870 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 512 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10072.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.63ms SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10393.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:00,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1870 Valid, 2102 Invalid, 3286 Unknown, 0 Unchecked, 12.63ms Time], IncrementalHoareTripleChecker [512 Valid, 2770 Invalid, 4 Unknown, 0 Unchecked, 10393.96ms Time] [2021-11-12 22:19:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15335 states. [2021-11-12 22:19:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15335 to 15271. [2021-11-12 22:19:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15271 states, 11962 states have (on average 1.6452934291924428) internal successors, (19681), 12415 states have internal predecessors, (19681), 2538 states have call successors, (2538), 709 states have call predecessors, (2538), 770 states have return successors, (4354), 2562 states have call predecessors, (4354), 2533 states have call successors, (4354) [2021-11-12 22:19:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15271 states to 15271 states and 26573 transitions. [2021-11-12 22:19:01,727 INFO L78 Accepts]: Start accepts. Automaton has 15271 states and 26573 transitions. Word has length 193 [2021-11-12 22:19:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:01,728 INFO L470 AbstractCegarLoop]: Abstraction has 15271 states and 26573 transitions. [2021-11-12 22:19:01,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 22:19:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 15271 states and 26573 transitions. [2021-11-12 22:19:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:19:01,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:01,743 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:01,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:01,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:01,959 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 434715322, now seen corresponding path program 1 times [2021-11-12 22:19:01,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:01,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947039010] [2021-11-12 22:19:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:01,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:01,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:01,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:19:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:02,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:19:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:19:03,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:19:03,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:03,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947039010] [2021-11-12 22:19:03,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947039010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:03,889 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:03,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:19:03,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270681291] [2021-11-12 22:19:03,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:03,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:19:03,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:19:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:19:03,892 INFO L87 Difference]: Start difference. First operand 15271 states and 26573 transitions. Second operand has 12 states, 12 states have (on average 18.583333333333332) internal successors, (223), 12 states have internal predecessors, (223), 8 states have call successors, (45), 6 states have call predecessors, (45), 7 states have return successors, (45), 8 states have call predecessors, (45), 7 states have call successors, (45) [2021-11-12 22:19:05,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:07,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:09,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:16,340 INFO L93 Difference]: Finished difference Result 60031 states and 108858 transitions. [2021-11-12 22:19:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:19:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.583333333333332) internal successors, (223), 12 states have internal predecessors, (223), 8 states have call successors, (45), 6 states have call predecessors, (45), 7 states have return successors, (45), 8 states have call predecessors, (45), 7 states have call successors, (45) Word has length 194 [2021-11-12 22:19:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:16,743 INFO L225 Difference]: With dead ends: 60031 [2021-11-12 22:19:16,744 INFO L226 Difference]: Without dead ends: 44802 [2021-11-12 22:19:16,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:19:16,843 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 3401 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 4584 mSolverCounterSat, 935 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10060.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 5522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.51ms SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 4584 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10868.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:16,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3526 Valid, 3068 Invalid, 5522 Unknown, 0 Unchecked, 25.51ms Time], IncrementalHoareTripleChecker [935 Valid, 4584 Invalid, 3 Unknown, 0 Unchecked, 10868.81ms Time] [2021-11-12 22:19:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44802 states. [2021-11-12 22:19:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44802 to 44398. [2021-11-12 22:19:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44398 states, 34692 states have (on average 1.6144644298397326) internal successors, (56009), 36040 states have internal predecessors, (56009), 7400 states have call successors, (7400), 2213 states have call predecessors, (7400), 2305 states have return successors, (14944), 7297 states have call predecessors, (14944), 7395 states have call successors, (14944) [2021-11-12 22:19:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44398 states to 44398 states and 78353 transitions. [2021-11-12 22:19:19,010 INFO L78 Accepts]: Start accepts. Automaton has 44398 states and 78353 transitions. Word has length 194 [2021-11-12 22:19:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:19,011 INFO L470 AbstractCegarLoop]: Abstraction has 44398 states and 78353 transitions. [2021-11-12 22:19:19,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.583333333333332) internal successors, (223), 12 states have internal predecessors, (223), 8 states have call successors, (45), 6 states have call predecessors, (45), 7 states have return successors, (45), 8 states have call predecessors, (45), 7 states have call successors, (45) [2021-11-12 22:19:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 44398 states and 78353 transitions. [2021-11-12 22:19:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 22:19:19,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:19,025 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:19,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:19,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:19,239 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:19,239 INFO L85 PathProgramCache]: Analyzing trace with hash 642574104, now seen corresponding path program 1 times [2021-11-12 22:19:19,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:19,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060205069] [2021-11-12 22:19:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:19,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:19,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:19,241 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:19,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:19:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:19,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:19,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:19:20,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:19:21,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:21,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060205069] [2021-11-12 22:19:21,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060205069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:21,139 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:21,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-12 22:19:21,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294330675] [2021-11-12 22:19:21,139 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:21,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:21,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:21,141 INFO L87 Difference]: Start difference. First operand 44398 states and 78353 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:19:23,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:25,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:27,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:40,382 INFO L93 Difference]: Finished difference Result 161683 states and 341358 transitions. [2021-11-12 22:19:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:19:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 196 [2021-11-12 22:19:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:41,751 INFO L225 Difference]: With dead ends: 161683 [2021-11-12 22:19:41,751 INFO L226 Difference]: Without dead ends: 117327 [2021-11-12 22:19:42,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:19:42,071 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 3812 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 5323 mSolverCounterSat, 1256 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11032.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3846 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 6582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.27ms SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 5323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11802.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:42,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3846 Valid, 4044 Invalid, 6582 Unknown, 0 Unchecked, 29.27ms Time], IncrementalHoareTripleChecker [1256 Valid, 5323 Invalid, 3 Unknown, 0 Unchecked, 11802.83ms Time] [2021-11-12 22:19:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117327 states. [2021-11-12 22:19:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117327 to 104436. [2021-11-12 22:19:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104436 states, 78157 states have (on average 1.5926532492291157) internal successors, (124477), 82577 states have internal predecessors, (124477), 21318 states have call successors, (21318), 4421 states have call predecessors, (21318), 4960 states have return successors, (51757), 21279 states have call predecessors, (51757), 21313 states have call successors, (51757) [2021-11-12 22:19:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104436 states to 104436 states and 197552 transitions. [2021-11-12 22:19:50,634 INFO L78 Accepts]: Start accepts. Automaton has 104436 states and 197552 transitions. Word has length 196 [2021-11-12 22:19:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:50,634 INFO L470 AbstractCegarLoop]: Abstraction has 104436 states and 197552 transitions. [2021-11-12 22:19:50,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:19:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 104436 states and 197552 transitions. [2021-11-12 22:19:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 22:19:50,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:50,658 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:50,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:50,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:50,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash 427744951, now seen corresponding path program 1 times [2021-11-12 22:19:50,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:50,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820944124] [2021-11-12 22:19:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:50,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:50,881 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:50,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e753937c-4649-4217-85fd-7ebe3678bde0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:19:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:19:52,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:19:52,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:52,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820944124] [2021-11-12 22:19:52,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820944124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:52,514 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:52,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-12 22:19:52,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523030480] [2021-11-12 22:19:52,514 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:52,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:19:52,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:52,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:19:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:52,516 INFO L87 Difference]: Start difference. First operand 104436 states and 197552 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37)