./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- [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-2329fc7 [2022-12-14 11:17:00,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:17:00,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:17:00,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:17:00,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:17:00,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:17:00,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:17:00,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:17:00,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:17:00,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:17:00,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:17:00,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:17:00,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:17:00,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:17:00,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:17:00,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:17:00,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:17:00,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:17:00,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:17:00,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:17:00,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:17:00,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:17:00,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:17:00,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:17:00,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:17:00,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:17:00,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:17:00,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:17:00,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:17:00,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:17:00,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:17:00,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:17:00,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:17:00,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:17:00,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:17:00,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:17:00,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:17:00,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:17:00,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:17:00,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:17:00,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:17:00,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:17:00,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:17:00,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:17:00,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:17:00,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:17:00,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:17:00,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:17:00,748 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:17:00,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:17:00,749 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:17:00,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:17:00,749 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:17:00,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:17:00,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:17:00,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:17:00,750 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:17:00,750 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:17:00,750 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:17:00,750 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:17:00,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:17:00,751 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:17:00,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:17:00,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:17:00,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:17:00,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:17:00,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:17:00,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:17:00,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:17:00,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:17:00,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:17:00,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:17:00,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:17:00,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:17:00,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:17:00,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:17:00,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:17:00,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:17:00,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:17:00,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:17:00,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:17:00,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:17:00,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:17:00,755 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_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2022-12-14 11:17:00,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:17:00,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:17:00,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:17:00,973 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:17:00,973 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:17:00,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2022-12-14 11:17:03,608 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:17:03,800 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:17:03,800 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2022-12-14 11:17:03,827 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/data/2c90bd9b0/048322d0997a4c019306ad19b872e912/FLAG828fd1128 [2022-12-14 11:17:03,838 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/data/2c90bd9b0/048322d0997a4c019306ad19b872e912 [2022-12-14 11:17:03,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:17:03,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:17:03,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:17:03,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:17:03,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:17:03,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:17:03" (1/1) ... [2022-12-14 11:17:03,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7231b928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:03, skipping insertion in model container [2022-12-14 11:17:03,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:17:03" (1/1) ... [2022-12-14 11:17:03,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:17:03,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:17:04,278 WARN L237 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_495f4561-882c-4d9e-a515-f927aab8abcf/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2022-12-14 11:17:04,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:17:04,294 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:17:04,381 WARN L237 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_495f4561-882c-4d9e-a515-f927aab8abcf/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2022-12-14 11:17:04,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:17:04,400 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:17:04,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04 WrapperNode [2022-12-14 11:17:04,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:17:04,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:17:04,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:17:04,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:17:04,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,474 INFO L138 Inliner]: procedures = 93, calls = 335, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1088 [2022-12-14 11:17:04,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:17:04,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:17:04,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:17:04,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:17:04,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,525 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:17:04,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:17:04,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:17:04,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:17:04,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (1/1) ... [2022-12-14 11:17:04,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:17:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:04,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:17:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:17:04,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:17:04,610 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 11:17:04,610 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 11:17:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:17:04,611 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:17:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 11:17:04,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 11:17:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:17:04,611 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:17:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:17:04,611 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:17:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:17:04,612 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:17:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:17:04,612 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:17:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:17:04,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:17:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:17:04,612 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:17:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:17:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:17:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:17:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:17:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:17:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:17:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:17:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:17:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 11:17:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 11:17:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:17:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:17:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:17:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:17:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:17:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:17:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:17:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:17:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 11:17:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 11:17:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:17:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:17:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:17:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:17:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:17:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:17:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:17:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:17:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:17:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:17:04,617 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:17:04,734 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:17:04,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:17:05,566 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:17:06,004 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:17:06,005 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:17:06,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:17:06 BoogieIcfgContainer [2022-12-14 11:17:06,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:17:06,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:17:06,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:17:06,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:17:06,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:17:03" (1/3) ... [2022-12-14 11:17:06,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293e2ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:17:06, skipping insertion in model container [2022-12-14 11:17:06,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:17:04" (2/3) ... [2022-12-14 11:17:06,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293e2ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:17:06, skipping insertion in model container [2022-12-14 11:17:06,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:17:06" (3/3) ... [2022-12-14 11:17:06,013 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2022-12-14 11:17:06,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:17:06,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:17:06,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:17:06,095 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;@44504f13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:17:06,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:17:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 359 states, 243 states have (on average 1.6008230452674896) internal successors, (389), 264 states have internal predecessors, (389), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-12-14 11:17:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 11:17:06,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:06,126 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:06,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:06,131 INFO L85 PathProgramCache]: Analyzing trace with hash -845409161, now seen corresponding path program 1 times [2022-12-14 11:17:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30768668] [2022-12-14 11:17:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:06,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:06,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30768668] [2022-12-14 11:17:06,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30768668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:06,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:06,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:17:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710578329] [2022-12-14 11:17:06,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:17:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:17:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:17:06,500 INFO L87 Difference]: Start difference. First operand has 359 states, 243 states have (on average 1.6008230452674896) internal successors, (389), 264 states have internal predecessors, (389), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 11:17:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:06,638 INFO L93 Difference]: Finished difference Result 377 states and 598 transitions. [2022-12-14 11:17:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:17:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2022-12-14 11:17:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:06,654 INFO L225 Difference]: With dead ends: 377 [2022-12-14 11:17:06,655 INFO L226 Difference]: Without dead ends: 355 [2022-12-14 11:17:06,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:17:06,660 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:06,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 529 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-12-14 11:17:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2022-12-14 11:17:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 241 states have (on average 1.5892116182572613) internal successors, (383), 260 states have internal predecessors, (383), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 11:17:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 560 transitions. [2022-12-14 11:17:06,723 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 560 transitions. Word has length 77 [2022-12-14 11:17:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:06,725 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 560 transitions. [2022-12-14 11:17:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 11:17:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 560 transitions. [2022-12-14 11:17:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 11:17:06,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:06,730 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:06,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:17:06,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1636687880, now seen corresponding path program 1 times [2022-12-14 11:17:06,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:06,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479323779] [2022-12-14 11:17:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:06,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:07,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:07,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479323779] [2022-12-14 11:17:07,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479323779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:07,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:07,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:17:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194338583] [2022-12-14 11:17:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:17:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:17:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:17:07,136 INFO L87 Difference]: Start difference. First operand 355 states and 560 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 11:17:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:08,724 INFO L93 Difference]: Finished difference Result 1074 states and 1721 transitions. [2022-12-14 11:17:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:17:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2022-12-14 11:17:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:08,730 INFO L225 Difference]: With dead ends: 1074 [2022-12-14 11:17:08,730 INFO L226 Difference]: Without dead ends: 735 [2022-12-14 11:17:08,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:17:08,733 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1099 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:08,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 1370 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:17:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-12-14 11:17:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 697. [2022-12-14 11:17:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 482 states have (on average 1.6016597510373445) internal successors, (772), 515 states have internal predecessors, (772), 172 states have call successors, (172), 42 states have call predecessors, (172), 42 states have return successors, (173), 164 states have call predecessors, (173), 167 states have call successors, (173) [2022-12-14 11:17:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1117 transitions. [2022-12-14 11:17:08,773 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1117 transitions. Word has length 78 [2022-12-14 11:17:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:08,774 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1117 transitions. [2022-12-14 11:17:08,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 11:17:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1117 transitions. [2022-12-14 11:17:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 11:17:08,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:08,776 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:17:08,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 354911552, now seen corresponding path program 1 times [2022-12-14 11:17:08,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:08,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567253710] [2022-12-14 11:17:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:08,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:08,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567253710] [2022-12-14 11:17:08,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567253710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:08,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:08,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262173885] [2022-12-14 11:17:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:08,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:08,860 INFO L87 Difference]: Start difference. First operand 697 states and 1117 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:09,034 INFO L93 Difference]: Finished difference Result 2031 states and 3289 transitions. [2022-12-14 11:17:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 82 [2022-12-14 11:17:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:09,041 INFO L225 Difference]: With dead ends: 2031 [2022-12-14 11:17:09,041 INFO L226 Difference]: Without dead ends: 1350 [2022-12-14 11:17:09,044 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 [2022-12-14 11:17:09,045 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 527 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:09,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1147 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-12-14 11:17:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1322. [2022-12-14 11:17:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 934 states have (on average 1.613490364025696) internal successors, (1507), 996 states have internal predecessors, (1507), 310 states have call successors, (310), 75 states have call predecessors, (310), 77 states have return successors, (324), 288 states have call predecessors, (324), 305 states have call successors, (324) [2022-12-14 11:17:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2141 transitions. [2022-12-14 11:17:09,102 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2141 transitions. Word has length 82 [2022-12-14 11:17:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:09,102 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 2141 transitions. [2022-12-14 11:17:09,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2141 transitions. [2022-12-14 11:17:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 11:17:09,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:09,105 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:09,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:17:09,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1882771010, now seen corresponding path program 1 times [2022-12-14 11:17:09,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:09,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173210597] [2022-12-14 11:17:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:09,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:09,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:09,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173210597] [2022-12-14 11:17:09,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173210597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:09,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:09,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261056979] [2022-12-14 11:17:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:09,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:09,183 INFO L87 Difference]: Start difference. First operand 1322 states and 2141 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:09,399 INFO L93 Difference]: Finished difference Result 3907 states and 6386 transitions. [2022-12-14 11:17:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:09,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 83 [2022-12-14 11:17:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:09,411 INFO L225 Difference]: With dead ends: 3907 [2022-12-14 11:17:09,411 INFO L226 Difference]: Without dead ends: 2602 [2022-12-14 11:17:09,416 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 [2022-12-14 11:17:09,417 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 526 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:09,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1153 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2022-12-14 11:17:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2573. [2022-12-14 11:17:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 1839 states have (on average 1.6182707993474714) internal successors, (2976), 1959 states have internal predecessors, (2976), 586 states have call successors, (586), 141 states have call predecessors, (586), 147 states have return successors, (642), 536 states have call predecessors, (642), 581 states have call successors, (642) [2022-12-14 11:17:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4204 transitions. [2022-12-14 11:17:09,547 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4204 transitions. Word has length 83 [2022-12-14 11:17:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:09,548 INFO L495 AbstractCegarLoop]: Abstraction has 2573 states and 4204 transitions. [2022-12-14 11:17:09,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4204 transitions. [2022-12-14 11:17:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 11:17:09,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:09,550 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:09,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:17:09,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1763517506, now seen corresponding path program 1 times [2022-12-14 11:17:09,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:09,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032269458] [2022-12-14 11:17:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:09,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:09,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:09,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032269458] [2022-12-14 11:17:09,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032269458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:09,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:09,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484005564] [2022-12-14 11:17:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:09,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:09,625 INFO L87 Difference]: Start difference. First operand 2573 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:09,953 INFO L93 Difference]: Finished difference Result 7660 states and 12658 transitions. [2022-12-14 11:17:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 84 [2022-12-14 11:17:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:09,991 INFO L225 Difference]: With dead ends: 7660 [2022-12-14 11:17:09,991 INFO L226 Difference]: Without dead ends: 5106 [2022-12-14 11:17:10,007 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 [2022-12-14 11:17:10,008 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:10,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1159 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2022-12-14 11:17:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 5076. [2022-12-14 11:17:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 3650 states have (on average 1.6191780821917807) internal successors, (5910), 3886 states have internal predecessors, (5910), 1138 states have call successors, (1138), 273 states have call predecessors, (1138), 287 states have return successors, (1338), 1032 states have call predecessors, (1338), 1133 states have call successors, (1338) [2022-12-14 11:17:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 8386 transitions. [2022-12-14 11:17:10,243 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 8386 transitions. Word has length 84 [2022-12-14 11:17:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:10,244 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 8386 transitions. [2022-12-14 11:17:10,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 8386 transitions. [2022-12-14 11:17:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:17:10,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:10,245 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:17:10,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1165651584, now seen corresponding path program 1 times [2022-12-14 11:17:10,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:10,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706447161] [2022-12-14 11:17:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:10,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706447161] [2022-12-14 11:17:10,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706447161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:10,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:10,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:10,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018900924] [2022-12-14 11:17:10,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:10,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:10,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:10,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:10,342 INFO L87 Difference]: Start difference. First operand 5076 states and 8386 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:10,824 INFO L93 Difference]: Finished difference Result 15167 states and 25499 transitions. [2022-12-14 11:17:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 85 [2022-12-14 11:17:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:10,867 INFO L225 Difference]: With dead ends: 15167 [2022-12-14 11:17:10,867 INFO L226 Difference]: Without dead ends: 10114 [2022-12-14 11:17:10,884 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 [2022-12-14 11:17:10,884 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 524 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:10,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1165 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2022-12-14 11:17:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 10083. [2022-12-14 11:17:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10083 states, 7273 states have (on average 1.6180393235253678) internal successors, (11768), 7741 states have internal predecessors, (11768), 2242 states have call successors, (2242), 537 states have call predecessors, (2242), 567 states have return successors, (2958), 2024 states have call predecessors, (2958), 2237 states have call successors, (2958) [2022-12-14 11:17:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10083 states to 10083 states and 16968 transitions. [2022-12-14 11:17:11,287 INFO L78 Accepts]: Start accepts. Automaton has 10083 states and 16968 transitions. Word has length 85 [2022-12-14 11:17:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:11,288 INFO L495 AbstractCegarLoop]: Abstraction has 10083 states and 16968 transitions. [2022-12-14 11:17:11,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10083 states and 16968 transitions. [2022-12-14 11:17:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 11:17:11,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:11,290 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:11,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:17:11,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1775576252, now seen corresponding path program 1 times [2022-12-14 11:17:11,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853443616] [2022-12-14 11:17:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:17:11,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:11,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853443616] [2022-12-14 11:17:11,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853443616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:11,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:11,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928159821] [2022-12-14 11:17:11,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:11,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:11,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:11,378 INFO L87 Difference]: Start difference. First operand 10083 states and 16968 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:11,752 INFO L93 Difference]: Finished difference Result 10741 states and 18117 transitions. [2022-12-14 11:17:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 86 [2022-12-14 11:17:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:11,793 INFO L225 Difference]: With dead ends: 10741 [2022-12-14 11:17:11,793 INFO L226 Difference]: Without dead ends: 10730 [2022-12-14 11:17:11,799 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 [2022-12-14 11:17:11,800 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 510 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:11,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1163 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2022-12-14 11:17:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 10704. [2022-12-14 11:17:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10704 states, 7722 states have (on average 1.6168091168091168) internal successors, (12485), 8219 states have internal predecessors, (12485), 2380 states have call successors, (2380), 570 states have call predecessors, (2380), 601 states have return successors, (3198), 2147 states have call predecessors, (3198), 2375 states have call successors, (3198) [2022-12-14 11:17:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10704 states to 10704 states and 18063 transitions. [2022-12-14 11:17:12,396 INFO L78 Accepts]: Start accepts. Automaton has 10704 states and 18063 transitions. Word has length 86 [2022-12-14 11:17:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:12,397 INFO L495 AbstractCegarLoop]: Abstraction has 10704 states and 18063 transitions. [2022-12-14 11:17:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 11:17:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10704 states and 18063 transitions. [2022-12-14 11:17:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 11:17:12,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:12,401 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:12,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:17:12,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1092381816, now seen corresponding path program 1 times [2022-12-14 11:17:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868038870] [2022-12-14 11:17:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 11:17:12,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:12,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868038870] [2022-12-14 11:17:12,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868038870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:12,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:12,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:17:12,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601020341] [2022-12-14 11:17:12,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:12,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:12,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:12,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:12,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:17:12,591 INFO L87 Difference]: Start difference. First operand 10704 states and 18063 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 11:17:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:13,144 INFO L93 Difference]: Finished difference Result 22785 states and 39300 transitions. [2022-12-14 11:17:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 131 [2022-12-14 11:17:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:13,200 INFO L225 Difference]: With dead ends: 22785 [2022-12-14 11:17:13,201 INFO L226 Difference]: Without dead ends: 12098 [2022-12-14 11:17:13,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:17:13,243 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 76 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:13,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1622 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12098 states. [2022-12-14 11:17:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12098 to 11060. [2022-12-14 11:17:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11060 states, 8030 states have (on average 1.6090909090909091) internal successors, (12921), 8527 states have internal predecessors, (12921), 2412 states have call successors, (2412), 570 states have call predecessors, (2412), 617 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-12-14 11:17:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11060 states to 11060 states and 18644 transitions. [2022-12-14 11:17:13,781 INFO L78 Accepts]: Start accepts. Automaton has 11060 states and 18644 transitions. Word has length 131 [2022-12-14 11:17:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:13,781 INFO L495 AbstractCegarLoop]: Abstraction has 11060 states and 18644 transitions. [2022-12-14 11:17:13,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 11:17:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11060 states and 18644 transitions. [2022-12-14 11:17:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 11:17:13,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:13,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:13,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:17:13,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1819764736, now seen corresponding path program 1 times [2022-12-14 11:17:13,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:13,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528570031] [2022-12-14 11:17:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 11:17:13,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528570031] [2022-12-14 11:17:13,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528570031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13028021] [2022-12-14 11:17:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:13,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:13,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:13,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:17:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:17:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:17:14,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:14,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13028021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:14,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:14,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:17:14,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381427184] [2022-12-14 11:17:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:17:14,353 INFO L87 Difference]: Start difference. First operand 11060 states and 18644 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:15,063 INFO L93 Difference]: Finished difference Result 23429 states and 40500 transitions. [2022-12-14 11:17:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 134 [2022-12-14 11:17:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:15,123 INFO L225 Difference]: With dead ends: 23429 [2022-12-14 11:17:15,123 INFO L226 Difference]: Without dead ends: 12386 [2022-12-14 11:17:15,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:17:15,163 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 213 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:15,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1356 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12386 states. [2022-12-14 11:17:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12386 to 12386. [2022-12-14 11:17:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12386 states, 9322 states have (on average 1.6523278266466424) internal successors, (15403), 9819 states have internal predecessors, (15403), 2412 states have call successors, (2412), 604 states have call predecessors, (2412), 651 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-12-14 11:17:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12386 states to 12386 states and 21126 transitions. [2022-12-14 11:17:15,797 INFO L78 Accepts]: Start accepts. Automaton has 12386 states and 21126 transitions. Word has length 134 [2022-12-14 11:17:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:15,798 INFO L495 AbstractCegarLoop]: Abstraction has 12386 states and 21126 transitions. [2022-12-14 11:17:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12386 states and 21126 transitions. [2022-12-14 11:17:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 11:17:15,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:15,803 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:15,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:16,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:16,004 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1694263529, now seen corresponding path program 1 times [2022-12-14 11:17:16,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:16,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119056858] [2022-12-14 11:17:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:16,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 11:17:16,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119056858] [2022-12-14 11:17:16,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119056858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297046356] [2022-12-14 11:17:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:16,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:16,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:16,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:17:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:17:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 11:17:16,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:16,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297046356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:16,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:16,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:17:16,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775804606] [2022-12-14 11:17:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:16,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:16,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:17:16,581 INFO L87 Difference]: Start difference. First operand 12386 states and 21126 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:17,094 INFO L93 Difference]: Finished difference Result 26081 states and 45430 transitions. [2022-12-14 11:17:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 139 [2022-12-14 11:17:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:17,143 INFO L225 Difference]: With dead ends: 26081 [2022-12-14 11:17:17,144 INFO L226 Difference]: Without dead ends: 13712 [2022-12-14 11:17:17,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:17:17,176 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 211 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:17,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1356 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2022-12-14 11:17:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 13712. [2022-12-14 11:17:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13712 states, 10614 states have (on average 1.6850386282268701) internal successors, (17885), 11111 states have internal predecessors, (17885), 2412 states have call successors, (2412), 638 states have call predecessors, (2412), 685 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-12-14 11:17:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13712 states to 13712 states and 23608 transitions. [2022-12-14 11:17:17,645 INFO L78 Accepts]: Start accepts. Automaton has 13712 states and 23608 transitions. Word has length 139 [2022-12-14 11:17:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:17,645 INFO L495 AbstractCegarLoop]: Abstraction has 13712 states and 23608 transitions. [2022-12-14 11:17:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13712 states and 23608 transitions. [2022-12-14 11:17:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 11:17:17,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:17,649 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:17,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:17,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:17,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash 292104211, now seen corresponding path program 1 times [2022-12-14 11:17:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231265815] [2022-12-14 11:17:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 11:17:18,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:18,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231265815] [2022-12-14 11:17:18,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231265815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:18,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763664444] [2022-12-14 11:17:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:18,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:18,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:18,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:17:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:19,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:17:19,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:17:19,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:19,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763664444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:19,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:19,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-12-14 11:17:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452748747] [2022-12-14 11:17:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:17:19,203 INFO L87 Difference]: Start difference. First operand 13712 states and 23608 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:19,671 INFO L93 Difference]: Finished difference Result 28733 states and 50360 transitions. [2022-12-14 11:17:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:19,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 143 [2022-12-14 11:17:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:19,719 INFO L225 Difference]: With dead ends: 28733 [2022-12-14 11:17:19,719 INFO L226 Difference]: Without dead ends: 15038 [2022-12-14 11:17:19,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:19,750 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 209 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:19,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1356 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15038 states. [2022-12-14 11:17:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15038 to 15038. [2022-12-14 11:17:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15038 states, 11906 states have (on average 1.7106500923903913) internal successors, (20367), 12403 states have internal predecessors, (20367), 2412 states have call successors, (2412), 672 states have call predecessors, (2412), 719 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-12-14 11:17:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15038 states to 15038 states and 26090 transitions. [2022-12-14 11:17:20,152 INFO L78 Accepts]: Start accepts. Automaton has 15038 states and 26090 transitions. Word has length 143 [2022-12-14 11:17:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:20,152 INFO L495 AbstractCegarLoop]: Abstraction has 15038 states and 26090 transitions. [2022-12-14 11:17:20,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 15038 states and 26090 transitions. [2022-12-14 11:17:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 11:17:20,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:20,156 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:20,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:17:20,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:17:20,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 901490484, now seen corresponding path program 1 times [2022-12-14 11:17:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:20,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866113954] [2022-12-14 11:17:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:17:21,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866113954] [2022-12-14 11:17:21,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866113954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691655542] [2022-12-14 11:17:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:21,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:21,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:21,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:17:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:17:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:17:21,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:21,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691655542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:21,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:21,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-12-14 11:17:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293391388] [2022-12-14 11:17:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:21,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:21,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:17:21,961 INFO L87 Difference]: Start difference. First operand 15038 states and 26090 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:22,594 INFO L93 Difference]: Finished difference Result 31385 states and 55290 transitions. [2022-12-14 11:17:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-12-14 11:17:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:22,654 INFO L225 Difference]: With dead ends: 31385 [2022-12-14 11:17:22,654 INFO L226 Difference]: Without dead ends: 16364 [2022-12-14 11:17:22,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:22,695 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 207 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:22,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1356 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16364 states. [2022-12-14 11:17:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16364 to 16364. [2022-12-14 11:17:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16364 states, 13198 states have (on average 1.731247158660403) internal successors, (22849), 13695 states have internal predecessors, (22849), 2412 states have call successors, (2412), 706 states have call predecessors, (2412), 753 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-12-14 11:17:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16364 states to 16364 states and 28572 transitions. [2022-12-14 11:17:23,156 INFO L78 Accepts]: Start accepts. Automaton has 16364 states and 28572 transitions. Word has length 146 [2022-12-14 11:17:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:23,156 INFO L495 AbstractCegarLoop]: Abstraction has 16364 states and 28572 transitions. [2022-12-14 11:17:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16364 states and 28572 transitions. [2022-12-14 11:17:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 11:17:23,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:23,160 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:23,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:17:23,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:17:23,360 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1828454938, now seen corresponding path program 1 times [2022-12-14 11:17:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:23,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790563411] [2022-12-14 11:17:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 11:17:24,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790563411] [2022-12-14 11:17:24,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790563411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513376981] [2022-12-14 11:17:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:24,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:24,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:24,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:24,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:17:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:17:24,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 11:17:24,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:24,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513376981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:24,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:24,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-12-14 11:17:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463141703] [2022-12-14 11:17:24,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:24,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:24,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:24,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:17:24,550 INFO L87 Difference]: Start difference. First operand 16364 states and 28572 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:24,945 INFO L93 Difference]: Finished difference Result 33926 states and 59253 transitions. [2022-12-14 11:17:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:17:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 148 [2022-12-14 11:17:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:25,007 INFO L225 Difference]: With dead ends: 33926 [2022-12-14 11:17:25,007 INFO L226 Difference]: Without dead ends: 17594 [2022-12-14 11:17:25,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:25,046 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 309 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:25,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1476 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-12-14 11:17:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 17406. [2022-12-14 11:17:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17406 states, 13844 states have (on average 1.710849465472407) internal successors, (23685), 14360 states have internal predecessors, (23685), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-12-14 11:17:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17406 states to 17406 states and 30377 transitions. [2022-12-14 11:17:25,584 INFO L78 Accepts]: Start accepts. Automaton has 17406 states and 30377 transitions. Word has length 148 [2022-12-14 11:17:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:25,585 INFO L495 AbstractCegarLoop]: Abstraction has 17406 states and 30377 transitions. [2022-12-14 11:17:25,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 11:17:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 17406 states and 30377 transitions. [2022-12-14 11:17:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 11:17:25,588 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:25,588 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:25,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:17:25,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:25,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1632447011, now seen corresponding path program 1 times [2022-12-14 11:17:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:25,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104262669] [2022-12-14 11:17:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 11:17:26,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:26,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104262669] [2022-12-14 11:17:26,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104262669] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:26,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446296312] [2022-12-14 11:17:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:26,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:26,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:26,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:17:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:17:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 11:17:27,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:27,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446296312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:27,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:27,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 25 [2022-12-14 11:17:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799246873] [2022-12-14 11:17:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:27,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:17:27,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:17:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:27,034 INFO L87 Difference]: Start difference. First operand 17406 states and 30377 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 11:17:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:27,621 INFO L93 Difference]: Finished difference Result 18043 states and 31736 transitions. [2022-12-14 11:17:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 151 [2022-12-14 11:17:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:27,678 INFO L225 Difference]: With dead ends: 18043 [2022-12-14 11:17:27,678 INFO L226 Difference]: Without dead ends: 17957 [2022-12-14 11:17:27,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:27,689 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 537 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:27,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 870 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17957 states. [2022-12-14 11:17:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17957 to 17438. [2022-12-14 11:17:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17438 states, 13876 states have (on average 1.7092101470164311) internal successors, (23717), 14392 states have internal predecessors, (23717), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-12-14 11:17:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17438 states to 17438 states and 30409 transitions. [2022-12-14 11:17:28,201 INFO L78 Accepts]: Start accepts. Automaton has 17438 states and 30409 transitions. Word has length 151 [2022-12-14 11:17:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:28,201 INFO L495 AbstractCegarLoop]: Abstraction has 17438 states and 30409 transitions. [2022-12-14 11:17:28,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 11:17:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17438 states and 30409 transitions. [2022-12-14 11:17:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 11:17:28,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:28,204 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:28,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:28,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:17:28,405 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:28,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1106312086, now seen corresponding path program 1 times [2022-12-14 11:17:28,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:28,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245634282] [2022-12-14 11:17:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 11:17:29,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245634282] [2022-12-14 11:17:29,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245634282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82057346] [2022-12-14 11:17:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:29,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:29,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:29,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:17:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:29,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:17:29,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 11:17:29,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:29,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82057346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:29,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:29,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 25 [2022-12-14 11:17:29,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675896323] [2022-12-14 11:17:29,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:29,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:17:29,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:17:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:29,503 INFO L87 Difference]: Start difference. First operand 17438 states and 30409 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 11:17:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:29,914 INFO L93 Difference]: Finished difference Result 17564 states and 30567 transitions. [2022-12-14 11:17:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:17:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) Word has length 156 [2022-12-14 11:17:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:29,963 INFO L225 Difference]: With dead ends: 17564 [2022-12-14 11:17:29,963 INFO L226 Difference]: Without dead ends: 17478 [2022-12-14 11:17:29,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:17:29,973 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 30 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:29,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2074 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2022-12-14 11:17:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 17438. [2022-12-14 11:17:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17438 states, 13876 states have (on average 1.7057509368694148) internal successors, (23669), 14392 states have internal predecessors, (23669), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-12-14 11:17:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17438 states to 17438 states and 30361 transitions. [2022-12-14 11:17:30,705 INFO L78 Accepts]: Start accepts. Automaton has 17438 states and 30361 transitions. Word has length 156 [2022-12-14 11:17:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:30,706 INFO L495 AbstractCegarLoop]: Abstraction has 17438 states and 30361 transitions. [2022-12-14 11:17:30,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 11:17:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 17438 states and 30361 transitions. [2022-12-14 11:17:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 11:17:30,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:30,710 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:30,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:17:30,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:17:30,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash -257421445, now seen corresponding path program 1 times [2022-12-14 11:17:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952577459] [2022-12-14 11:17:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 11:17:31,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952577459] [2022-12-14 11:17:31,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952577459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814407629] [2022-12-14 11:17:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:31,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:31,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:31,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:17:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:17:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 11:17:32,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:32,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814407629] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:32,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:17:32,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-12-14 11:17:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715413518] [2022-12-14 11:17:32,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:32,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:17:32,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:17:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:17:32,152 INFO L87 Difference]: Start difference. First operand 17438 states and 30361 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-14 11:17:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:32,694 INFO L93 Difference]: Finished difference Result 18465 states and 33161 transitions. [2022-12-14 11:17:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2022-12-14 11:17:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:32,752 INFO L225 Difference]: With dead ends: 18465 [2022-12-14 11:17:32,753 INFO L226 Difference]: Without dead ends: 18379 [2022-12-14 11:17:32,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:17:32,765 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 44 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:32,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1632 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18379 states. [2022-12-14 11:17:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18379 to 17534. [2022-12-14 11:17:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 13972 states have (on average 1.7009018036072143) internal successors, (23765), 14488 states have internal predecessors, (23765), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-12-14 11:17:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 30457 transitions. [2022-12-14 11:17:33,289 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 30457 transitions. Word has length 163 [2022-12-14 11:17:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:33,290 INFO L495 AbstractCegarLoop]: Abstraction has 17534 states and 30457 transitions. [2022-12-14 11:17:33,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-14 11:17:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 30457 transitions. [2022-12-14 11:17:33,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 11:17:33,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:33,295 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:33,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:33,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash 642887509, now seen corresponding path program 1 times [2022-12-14 11:17:33,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:33,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442940643] [2022-12-14 11:17:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:33,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 11:17:34,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442940643] [2022-12-14 11:17:34,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442940643] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54001428] [2022-12-14 11:17:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:34,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:34,447 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:34,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495f4561-882c-4d9e-a515-f927aab8abcf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:17:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 11:17:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 11:17:35,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:37,218 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:17:43,712 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:17:43,833 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 11:20:18,860 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 11:20:19,251 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:20:25,118 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.