./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI --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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:42:31,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:42:31,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:42:31,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:42:31,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:42:31,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:42:31,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:42:31,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:42:31,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:42:31,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:42:31,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:42:31,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:42:31,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:42:31,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:42:31,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:42:31,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:42:31,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:42:31,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:42:31,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:42:31,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:42:31,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:42:31,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:42:31,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:42:31,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:42:31,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:42:31,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:42:31,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:42:31,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:42:31,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:42:31,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:42:31,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:42:31,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:42:31,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:42:31,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:42:31,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:42:31,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:42:31,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:42:31,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:42:31,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:42:31,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:42:31,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:42:31,284 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:42:31,337 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:42:31,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:42:31,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:42:31,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:42:31,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:42:31,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:42:31,341 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:42:31,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:42:31,341 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:42:31,342 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:42:31,343 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:42:31,344 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:42:31,344 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:42:31,344 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:42:31,344 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:42:31,345 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:42:31,345 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:42:31,345 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:42:31,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:42:31,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:42:31,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:42:31,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:42:31,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:42:31,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:42:31,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:42:31,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:42:31,349 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:42:31,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:42:31,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:42:31,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:42:31,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:42:31,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:42:31,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:31,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:42:31,352 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:42:31,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:42:31,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:42:31,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:42:31,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:42:31,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:42:31,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:42:31,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2022-11-03 02:42:31,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:42:31,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:42:31,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:42:31,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:42:31,794 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:42:31,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2022-11-03 02:42:31,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/data/84539e348/6691cea278074980ba28bb6f69ebd002/FLAGd69378399 [2022-11-03 02:42:32,711 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:42:32,712 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2022-11-03 02:42:32,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/data/84539e348/6691cea278074980ba28bb6f69ebd002/FLAGd69378399 [2022-11-03 02:42:32,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/data/84539e348/6691cea278074980ba28bb6f69ebd002 [2022-11-03 02:42:32,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:42:32,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:42:32,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:32,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:42:32,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:42:32,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:32" (1/1) ... [2022-11-03 02:42:32,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a9bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:32, skipping insertion in model container [2022-11-03 02:42:32,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:32" (1/1) ... [2022-11-03 02:42:32,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:42:32,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:42:33,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2022-11-03 02:42:33,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:33,690 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:42:33,723 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2022-11-03 02:42:33,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:33,860 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:42:33,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33 WrapperNode [2022-11-03 02:42:33,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:33,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:33,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:42:33,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:42:33,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:33,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:33,964 INFO L138 Inliner]: procedures = 91, calls = 344, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1101 [2022-11-03 02:42:33,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:33,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:42:33,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:42:33,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:42:33,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:33,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:33,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:33,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:34,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:34,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:34,019 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:34,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:34,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:42:34,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:42:34,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:42:34,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:42:34,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (1/1) ... [2022-11-03 02:42:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:34,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:34,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:42:34,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:42:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:42:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 02:42:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 02:42:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:42:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:42:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:42:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:42:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:42:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:42:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:42:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:42:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:42:34,128 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:42:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:42:34,128 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:42:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:42:34,129 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:42:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:42:34,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:42:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:42:34,129 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:42:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:42:34,130 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:42:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:42:34,130 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:42:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:42:34,131 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:42:34,131 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 02:42:34,131 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 02:42:34,131 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:42:34,131 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:42:34,132 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 02:42:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 02:42:34,132 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 02:42:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 02:42:34,132 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:42:34,133 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:42:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:42:34,133 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:42:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:42:34,133 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:42:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:42:34,134 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:42:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:42:34,135 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:42:34,135 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:42:34,136 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:42:34,136 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:42:34,137 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:42:34,138 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:42:34,138 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:42:34,138 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:42:34,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:42:34,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:42:34,139 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:42:34,139 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:42:34,361 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:42:34,363 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:42:35,867 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:42:36,799 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:42:36,799 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:42:36,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:36 BoogieIcfgContainer [2022-11-03 02:42:36,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:42:36,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:42:36,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:42:36,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:42:36,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:42:32" (1/3) ... [2022-11-03 02:42:36,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b41454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:36, skipping insertion in model container [2022-11-03 02:42:36,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:33" (2/3) ... [2022-11-03 02:42:36,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b41454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:36, skipping insertion in model container [2022-11-03 02:42:36,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:36" (3/3) ... [2022-11-03 02:42:36,816 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product11.cil.c [2022-11-03 02:42:36,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:42:36,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:42:36,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:42:36,952 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@37c6b16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:42:36,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:42:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-03 02:42:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:42:36,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:36,992 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:42:36,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1012587652, now seen corresponding path program 1 times [2022-11-03 02:42:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818840311] [2022-11-03 02:42:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:37,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:38,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818840311] [2022-11-03 02:42:38,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818840311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:38,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:38,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:42:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028411318] [2022-11-03 02:42:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:38,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:38,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:38,452 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:42:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:39,897 INFO L93 Difference]: Finished difference Result 1429 states and 2342 transitions. [2022-11-03 02:42:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:42:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-03 02:42:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:39,943 INFO L225 Difference]: With dead ends: 1429 [2022-11-03 02:42:39,943 INFO L226 Difference]: Without dead ends: 1027 [2022-11-03 02:42:39,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:39,972 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 849 mSDsluCounter, 3316 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 4128 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:39,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 4128 Invalid, 802 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [88 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:42:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-11-03 02:42:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 744. [2022-11-03 02:42:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 509 states have (on average 1.5658153241650294) internal successors, (797), 539 states have internal predecessors, (797), 190 states have call successors, (190), 47 states have call predecessors, (190), 44 states have return successors, (197), 177 states have call predecessors, (197), 186 states have call successors, (197) [2022-11-03 02:42:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1184 transitions. [2022-11-03 02:42:40,140 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1184 transitions. Word has length 87 [2022-11-03 02:42:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:40,141 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1184 transitions. [2022-11-03 02:42:40,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:42:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1184 transitions. [2022-11-03 02:42:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:42:40,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:40,147 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:42:40,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:42:40,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1536212951, now seen corresponding path program 1 times [2022-11-03 02:42:40,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:40,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845376481] [2022-11-03 02:42:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:42:40,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:40,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845376481] [2022-11-03 02:42:40,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845376481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:40,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418625279] [2022-11-03 02:42:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:40,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:40,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:40,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:40,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:42:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:42:41,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:41,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418625279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:41,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:41,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187122413] [2022-11-03 02:42:41,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:41,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:41,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:41,344 INFO L87 Difference]: Start difference. First operand 744 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:42:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:41,697 INFO L93 Difference]: Finished difference Result 2108 states and 3421 transitions. [2022-11-03 02:42:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-03 02:42:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:41,713 INFO L225 Difference]: With dead ends: 2108 [2022-11-03 02:42:41,713 INFO L226 Difference]: Without dead ends: 1376 [2022-11-03 02:42:41,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:41,724 INFO L413 NwaCegarLoop]: 1028 mSDtfsCounter, 560 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:41,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1530 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:42:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-11-03 02:42:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1343. [2022-11-03 02:42:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 926 states have (on average 1.5755939524838012) internal successors, (1459), 985 states have internal predecessors, (1459), 333 states have call successors, (333), 84 states have call predecessors, (333), 83 states have return successors, (360), 313 states have call predecessors, (360), 329 states have call successors, (360) [2022-11-03 02:42:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2152 transitions. [2022-11-03 02:42:41,887 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2152 transitions. Word has length 86 [2022-11-03 02:42:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:41,890 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 2152 transitions. [2022-11-03 02:42:41,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:42:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2152 transitions. [2022-11-03 02:42:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:42:41,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:41,900 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:42:41,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:42,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:42,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1494770255, now seen corresponding path program 1 times [2022-11-03 02:42:42,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:42,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251389171] [2022-11-03 02:42:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:42,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:42:42,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251389171] [2022-11-03 02:42:42,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251389171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396980] [2022-11-03 02:42:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:42,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:42,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:42,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:42,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:42:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:42,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:42:43,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:43,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:43,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937428056] [2022-11-03 02:42:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:43,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:43,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:43,024 INFO L87 Difference]: Start difference. First operand 1343 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:43,272 INFO L93 Difference]: Finished difference Result 2919 states and 4760 transitions. [2022-11-03 02:42:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2022-11-03 02:42:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:43,285 INFO L225 Difference]: With dead ends: 2919 [2022-11-03 02:42:43,285 INFO L226 Difference]: Without dead ends: 1588 [2022-11-03 02:42:43,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:43,301 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 104 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:43,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1409 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:42:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-11-03 02:42:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1371. [2022-11-03 02:42:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 950 states have (on average 1.565263157894737) internal successors, (1487), 1009 states have internal predecessors, (1487), 337 states have call successors, (337), 84 states have call predecessors, (337), 83 states have return successors, (364), 317 states have call predecessors, (364), 333 states have call successors, (364) [2022-11-03 02:42:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2188 transitions. [2022-11-03 02:42:43,409 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2188 transitions. Word has length 88 [2022-11-03 02:42:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:43,410 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 2188 transitions. [2022-11-03 02:42:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2188 transitions. [2022-11-03 02:42:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:42:43,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:43,418 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:42:43,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:43,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 02:42:43,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash -55875038, now seen corresponding path program 1 times [2022-11-03 02:42:43,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:43,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501547240] [2022-11-03 02:42:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:42:44,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:44,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501547240] [2022-11-03 02:42:44,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501547240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857697353] [2022-11-03 02:42:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:44,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:44,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:44,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:42:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:42:44,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857697353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:44,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:44,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40214673] [2022-11-03 02:42:44,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:44,648 INFO L87 Difference]: Start difference. First operand 1371 states and 2188 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:42:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:45,002 INFO L93 Difference]: Finished difference Result 3362 states and 5441 transitions. [2022-11-03 02:42:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:45,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-11-03 02:42:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:45,029 INFO L225 Difference]: With dead ends: 3362 [2022-11-03 02:42:45,029 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 02:42:45,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:45,046 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 560 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:45,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1569 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:42:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 02:42:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1958. [2022-11-03 02:42:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1361 states have (on average 1.5716385011021308) internal successors, (2139), 1449 states have internal predecessors, (2139), 477 states have call successors, (477), 118 states have call predecessors, (477), 119 states have return successors, (524), 450 states have call predecessors, (524), 473 states have call successors, (524) [2022-11-03 02:42:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 3140 transitions. [2022-11-03 02:42:45,203 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 3140 transitions. Word has length 87 [2022-11-03 02:42:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:45,209 INFO L495 AbstractCegarLoop]: Abstraction has 1958 states and 3140 transitions. [2022-11-03 02:42:45,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:42:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 3140 transitions. [2022-11-03 02:42:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:42:45,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:45,222 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:42:45,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:45,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:45,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:45,451 INFO L85 PathProgramCache]: Analyzing trace with hash -710537829, now seen corresponding path program 1 times [2022-11-03 02:42:45,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:45,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781692617] [2022-11-03 02:42:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:42:45,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:45,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781692617] [2022-11-03 02:42:45,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781692617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:45,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968811125] [2022-11-03 02:42:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:45,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:42:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:42:46,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:42:46,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:46,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968811125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:46,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:46,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574626610] [2022-11-03 02:42:46,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:46,360 INFO L87 Difference]: Start difference. First operand 1958 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:42:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:46,905 INFO L93 Difference]: Finished difference Result 5614 states and 9107 transitions. [2022-11-03 02:42:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-03 02:42:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:46,940 INFO L225 Difference]: With dead ends: 5614 [2022-11-03 02:42:46,940 INFO L226 Difference]: Without dead ends: 3669 [2022-11-03 02:42:46,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:46,966 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 493 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:46,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1232 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:42:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2022-11-03 02:42:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3641. [2022-11-03 02:42:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 2511 states have (on average 1.5205097570688968) internal successors, (3818), 2685 states have internal predecessors, (3818), 902 states have call successors, (902), 230 states have call predecessors, (902), 227 states have return successors, (1033), 839 states have call predecessors, (1033), 896 states have call successors, (1033) [2022-11-03 02:42:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5753 transitions. [2022-11-03 02:42:47,317 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5753 transitions. Word has length 88 [2022-11-03 02:42:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 3641 states and 5753 transitions. [2022-11-03 02:42:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:42:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5753 transitions. [2022-11-03 02:42:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:42:47,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:47,322 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:42:47,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:47,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1825455868, now seen corresponding path program 1 times [2022-11-03 02:42:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:47,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46969448] [2022-11-03 02:42:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:42:47,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46969448] [2022-11-03 02:42:47,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46969448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305531630] [2022-11-03 02:42:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:47,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:47,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:47,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:42:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:48,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:42:48,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305531630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:48,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:48,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:42:48,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866611345] [2022-11-03 02:42:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:48,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:42:48,444 INFO L87 Difference]: Start difference. First operand 3641 states and 5753 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:42:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:49,976 INFO L93 Difference]: Finished difference Result 7345 states and 11746 transitions. [2022-11-03 02:42:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:42:49,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-03 02:42:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:50,012 INFO L225 Difference]: With dead ends: 7345 [2022-11-03 02:42:50,013 INFO L226 Difference]: Without dead ends: 3716 [2022-11-03 02:42:50,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:42:50,052 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 629 mSDsluCounter, 2698 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:50,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 3268 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:42:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2022-11-03 02:42:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3700. [2022-11-03 02:42:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 2484 states have (on average 1.5056360708534622) internal successors, (3740), 2705 states have internal predecessors, (3740), 1006 states have call successors, (1006), 210 states have call predecessors, (1006), 209 states have return successors, (1155), 920 states have call predecessors, (1155), 1000 states have call successors, (1155) [2022-11-03 02:42:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5901 transitions. [2022-11-03 02:42:50,367 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5901 transitions. Word has length 89 [2022-11-03 02:42:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:50,367 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5901 transitions. [2022-11-03 02:42:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:42:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5901 transitions. [2022-11-03 02:42:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:42:50,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:50,370 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:42:50,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:50,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:50,582 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1184986203, now seen corresponding path program 1 times [2022-11-03 02:42:50,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:50,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812520861] [2022-11-03 02:42:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:50,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:42:51,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812520861] [2022-11-03 02:42:51,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812520861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:51,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48724055] [2022-11-03 02:42:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:51,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:51,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:51,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:42:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:42:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:42:52,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:52,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48724055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:52,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:52,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-03 02:42:52,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194821722] [2022-11-03 02:42:52,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:52,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:42:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:42:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:42:52,201 INFO L87 Difference]: Start difference. First operand 3700 states and 5901 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:42:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:55,506 INFO L93 Difference]: Finished difference Result 9174 states and 14947 transitions. [2022-11-03 02:42:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:42:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-03 02:42:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:55,598 INFO L225 Difference]: With dead ends: 9174 [2022-11-03 02:42:55,598 INFO L226 Difference]: Without dead ends: 5486 [2022-11-03 02:42:55,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:42:55,621 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 1603 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 2442 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:55,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1661 Valid, 2442 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:42:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2022-11-03 02:42:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4040. [2022-11-03 02:42:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 2740 states have (on average 1.4883211678832118) internal successors, (4078), 2969 states have internal predecessors, (4078), 1066 states have call successors, (1066), 238 states have call predecessors, (1066), 233 states have return successors, (1217), 968 states have call predecessors, (1217), 1060 states have call successors, (1217) [2022-11-03 02:42:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 6361 transitions. [2022-11-03 02:42:56,036 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 6361 transitions. Word has length 94 [2022-11-03 02:42:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:56,036 INFO L495 AbstractCegarLoop]: Abstraction has 4040 states and 6361 transitions. [2022-11-03 02:42:56,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:42:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 6361 transitions. [2022-11-03 02:42:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:42:56,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:56,042 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:42:56,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:42:56,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:56,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1095828346, now seen corresponding path program 1 times [2022-11-03 02:42:56,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:56,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006339482] [2022-11-03 02:42:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:42:57,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:57,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006339482] [2022-11-03 02:42:57,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006339482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:57,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171177530] [2022-11-03 02:42:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:57,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:57,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:57,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:42:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:57,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:42:57,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:42:57,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:57,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171177530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:57,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:57,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-03 02:42:57,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001586686] [2022-11-03 02:42:57,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:57,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:57,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:57,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:57,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:42:57,588 INFO L87 Difference]: Start difference. First operand 4040 states and 6361 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:42:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:58,815 INFO L93 Difference]: Finished difference Result 8425 states and 13562 transitions. [2022-11-03 02:42:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:42:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-11-03 02:42:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:58,865 INFO L225 Difference]: With dead ends: 8425 [2022-11-03 02:42:58,866 INFO L226 Difference]: Without dead ends: 5206 [2022-11-03 02:42:58,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:42:58,888 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 139 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:58,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3146 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:42:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2022-11-03 02:42:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 4264. [2022-11-03 02:42:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 2892 states have (on average 1.4827109266943292) internal successors, (4288), 3142 states have internal predecessors, (4288), 1125 states have call successors, (1125), 238 states have call predecessors, (1125), 246 states have return successors, (1316), 1037 states have call predecessors, (1316), 1119 states have call successors, (1316) [2022-11-03 02:42:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 6729 transitions. [2022-11-03 02:42:59,413 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 6729 transitions. Word has length 99 [2022-11-03 02:42:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:59,414 INFO L495 AbstractCegarLoop]: Abstraction has 4264 states and 6729 transitions. [2022-11-03 02:42:59,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:42:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 6729 transitions. [2022-11-03 02:42:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:42:59,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:59,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:42:59,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:59,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:42:59,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1147227239, now seen corresponding path program 1 times [2022-11-03 02:42:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:59,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436138538] [2022-11-03 02:42:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:43:00,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:00,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436138538] [2022-11-03 02:43:00,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436138538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:00,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282660027] [2022-11-03 02:43:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:00,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:00,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:43:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:43:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:43:01,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282660027] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:01,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:01,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-03 02:43:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356576662] [2022-11-03 02:43:01,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:01,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:43:01,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:43:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:43:01,547 INFO L87 Difference]: Start difference. First operand 4264 states and 6729 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:43:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:06,924 INFO L93 Difference]: Finished difference Result 11670 states and 19372 transitions. [2022-11-03 02:43:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:43:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-03 02:43:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:07,008 INFO L225 Difference]: With dead ends: 11670 [2022-11-03 02:43:07,009 INFO L226 Difference]: Without dead ends: 8593 [2022-11-03 02:43:07,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:43:07,038 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 3049 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 1435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3134 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1435 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:07,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3134 Valid, 2979 Invalid, 4013 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1435 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:43:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2022-11-03 02:43:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 7392. [2022-11-03 02:43:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 5230 states have (on average 1.4862332695984704) internal successors, (7773), 5520 states have internal predecessors, (7773), 1655 states have call successors, (1655), 468 states have call predecessors, (1655), 506 states have return successors, (2384), 1547 states have call predecessors, (2384), 1647 states have call successors, (2384) [2022-11-03 02:43:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 11812 transitions. [2022-11-03 02:43:08,032 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 11812 transitions. Word has length 103 [2022-11-03 02:43:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:08,033 INFO L495 AbstractCegarLoop]: Abstraction has 7392 states and 11812 transitions. [2022-11-03 02:43:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:43:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 11812 transitions. [2022-11-03 02:43:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:43:08,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:08,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:43:08,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 02:43:08,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:43:08,256 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash 91050475, now seen corresponding path program 1 times [2022-11-03 02:43:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037353679] [2022-11-03 02:43:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:43:09,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:09,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037353679] [2022-11-03 02:43:09,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037353679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:09,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011048247] [2022-11-03 02:43:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:09,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:09,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:09,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:43:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:09,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:43:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:43:09,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:09,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011048247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:09,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:09,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-03 02:43:09,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014307264] [2022-11-03 02:43:09,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:09,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:09,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:09,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:09,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:43:09,644 INFO L87 Difference]: Start difference. First operand 7392 states and 11812 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:43:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:10,934 INFO L93 Difference]: Finished difference Result 13611 states and 21796 transitions. [2022-11-03 02:43:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:43:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-03 02:43:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:11,000 INFO L225 Difference]: With dead ends: 13611 [2022-11-03 02:43:11,001 INFO L226 Difference]: Without dead ends: 7414 [2022-11-03 02:43:11,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:43:11,045 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 417 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:11,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2579 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:43:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2022-11-03 02:43:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 7392. [2022-11-03 02:43:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 5230 states have (on average 1.4862332695984704) internal successors, (7773), 5520 states have internal predecessors, (7773), 1655 states have call successors, (1655), 468 states have call predecessors, (1655), 506 states have return successors, (2376), 1547 states have call predecessors, (2376), 1647 states have call successors, (2376) [2022-11-03 02:43:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 11804 transitions. [2022-11-03 02:43:11,867 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 11804 transitions. Word has length 107 [2022-11-03 02:43:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:11,868 INFO L495 AbstractCegarLoop]: Abstraction has 7392 states and 11804 transitions. [2022-11-03 02:43:11,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:43:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 11804 transitions. [2022-11-03 02:43:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:43:11,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:11,878 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:43:11,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:43:12,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1325625754, now seen corresponding path program 1 times [2022-11-03 02:43:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:12,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057685850] [2022-11-03 02:43:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:43:12,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:12,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057685850] [2022-11-03 02:43:12,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057685850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:12,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185650915] [2022-11-03 02:43:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:12,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:12,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:12,988 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:12,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:43:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:43:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:43:13,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:13,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185650915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:13,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:13,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-03 02:43:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149413264] [2022-11-03 02:43:13,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:13,769 INFO L87 Difference]: Start difference. First operand 7392 states and 11804 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:43:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:16,812 INFO L93 Difference]: Finished difference Result 25166 states and 43201 transitions. [2022-11-03 02:43:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-03 02:43:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:16,963 INFO L225 Difference]: With dead ends: 25166 [2022-11-03 02:43:16,963 INFO L226 Difference]: Without dead ends: 17786 [2022-11-03 02:43:17,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:43:17,031 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 789 mSDsluCounter, 3428 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:17,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 4283 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:43:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17786 states. [2022-11-03 02:43:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17786 to 14694. [2022-11-03 02:43:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14694 states, 10428 states have (on average 1.4822593018795551) internal successors, (15457), 11020 states have internal predecessors, (15457), 3299 states have call successors, (3299), 887 states have call predecessors, (3299), 966 states have return successors, (5497), 3032 states have call predecessors, (5497), 3287 states have call successors, (5497) [2022-11-03 02:43:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14694 states to 14694 states and 24253 transitions. [2022-11-03 02:43:18,916 INFO L78 Accepts]: Start accepts. Automaton has 14694 states and 24253 transitions. Word has length 134 [2022-11-03 02:43:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:18,917 INFO L495 AbstractCegarLoop]: Abstraction has 14694 states and 24253 transitions. [2022-11-03 02:43:18,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:43:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 14694 states and 24253 transitions. [2022-11-03 02:43:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:43:18,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:18,923 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-11-03 02:43:18,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:19,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:19,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2092019348, now seen corresponding path program 1 times [2022-11-03 02:43:19,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:19,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793098538] [2022-11-03 02:43:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:19,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:43:20,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:20,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793098538] [2022-11-03 02:43:20,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793098538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:20,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:20,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 02:43:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817980878] [2022-11-03 02:43:20,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:20,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:43:20,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:43:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:43:20,635 INFO L87 Difference]: Start difference. First operand 14694 states and 24253 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-03 02:43:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:31,170 INFO L93 Difference]: Finished difference Result 55438 states and 95762 transitions. [2022-11-03 02:43:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:43:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-03 02:43:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:31,461 INFO L225 Difference]: With dead ends: 55438 [2022-11-03 02:43:31,461 INFO L226 Difference]: Without dead ends: 40756 [2022-11-03 02:43:31,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:43:31,709 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 3546 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 7276 mSolverCounterSat, 1665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3649 SdHoareTripleChecker+Valid, 4313 SdHoareTripleChecker+Invalid, 8941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1665 IncrementalHoareTripleChecker+Valid, 7276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:31,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3649 Valid, 4313 Invalid, 8941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1665 Valid, 7276 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 02:43:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40756 states. [2022-11-03 02:43:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40756 to 35261. [2022-11-03 02:43:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35261 states, 26040 states have (on average 1.4866743471582182) internal successors, (38713), 26992 states have internal predecessors, (38713), 6492 states have call successors, (6492), 2463 states have call predecessors, (6492), 2728 states have return successors, (10659), 6231 states have call predecessors, (10659), 6472 states have call successors, (10659) [2022-11-03 02:43:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35261 states to 35261 states and 55864 transitions. [2022-11-03 02:43:36,135 INFO L78 Accepts]: Start accepts. Automaton has 35261 states and 55864 transitions. Word has length 140 [2022-11-03 02:43:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:36,136 INFO L495 AbstractCegarLoop]: Abstraction has 35261 states and 55864 transitions. [2022-11-03 02:43:36,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-03 02:43:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 35261 states and 55864 transitions. [2022-11-03 02:43:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 02:43:36,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:36,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:43:36,157 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash -648347971, now seen corresponding path program 1 times [2022-11-03 02:43:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:36,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894998823] [2022-11-03 02:43:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-03 02:43:36,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894998823] [2022-11-03 02:43:36,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894998823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:36,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148620806] [2022-11-03 02:43:36,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:36,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:36,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:36,384 INFO L87 Difference]: Start difference. First operand 35261 states and 55864 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:43:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:40,915 INFO L93 Difference]: Finished difference Result 82310 states and 132218 transitions. [2022-11-03 02:43:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2022-11-03 02:43:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:41,293 INFO L225 Difference]: With dead ends: 82310 [2022-11-03 02:43:41,294 INFO L226 Difference]: Without dead ends: 47061 [2022-11-03 02:43:41,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:41,712 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 520 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:41,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1382 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47061 states. [2022-11-03 02:43:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47061 to 46692. [2022-11-03 02:43:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46692 states, 34523 states have (on average 1.4873562552501232) internal successors, (51348), 35801 states have internal predecessors, (51348), 8544 states have call successors, (8544), 3253 states have call predecessors, (8544), 3624 states have return successors, (14142), 8207 states have call predecessors, (14142), 8524 states have call successors, (14142) [2022-11-03 02:43:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46692 states to 46692 states and 74034 transitions. [2022-11-03 02:43:46,746 INFO L78 Accepts]: Start accepts. Automaton has 46692 states and 74034 transitions. Word has length 172 [2022-11-03 02:43:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:46,747 INFO L495 AbstractCegarLoop]: Abstraction has 46692 states and 74034 transitions. [2022-11-03 02:43:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:43:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 46692 states and 74034 transitions. [2022-11-03 02:43:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-03 02:43:46,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:46,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:43:46,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1939752274, now seen corresponding path program 1 times [2022-11-03 02:43:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:46,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512377051] [2022-11-03 02:43:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-03 02:43:47,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512377051] [2022-11-03 02:43:47,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512377051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929538464] [2022-11-03 02:43:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:47,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:47,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:47,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:47,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a657c54-0991-4a16-a10c-f3a6d99b8bd2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:43:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:43:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:43:47,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:43:48,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929538464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050753063] [2022-11-03 02:43:48,418 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-03 02:43:48,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:48,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:48,429 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:48,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:58,642 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-03 02:44:08,590 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-03 02:44:08,592 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 58 for LOIs [2022-11-03 02:44:09,254 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 33 for LOIs [2022-11-03 02:44:09,288 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 49 for LOIs [2022-11-03 02:44:09,479 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 33 for LOIs [2022-11-03 02:44:09,494 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-11-03 02:44:09,518 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-11-03 02:44:12,835 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-11-03 02:44:13,051 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 49 for LOIs [2022-11-03 02:44:13,056 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 43 for LOIs [2022-11-03 02:44:13,069 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-11-03 02:44:13,078 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-11-03 02:44:17,914 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs