./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/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_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/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_ae454baf-41de-49d1-9d2a-6aee8b0d156f/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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- 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 10:27:12,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:27:12,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:27:12,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:27:12,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:27:12,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:27:12,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:27:12,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:27:12,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:27:12,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:27:12,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:27:12,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:27:12,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:27:12,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:27:12,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:27:12,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:27:12,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:27:12,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:27:12,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:27:12,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:27:12,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:27:12,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:27:12,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:27:12,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:27:12,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:27:12,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:27:12,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:27:12,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:27:12,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:27:12,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:27:12,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:27:12,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:27:12,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:27:12,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:27:12,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:27:12,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:27:12,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:27:12,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:27:12,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:27:12,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:27:12,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:27:12,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:27:12,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:27:12,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:27:12,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:27:12,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:27:12,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:27:12,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:27:12,945 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:27:12,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:27:12,946 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:27:12,946 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:27:12,946 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:27:12,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:27:12,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:27:12,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:27:12,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:27:12,947 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:27:12,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:27:12,947 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:27:12,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:27:12,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:27:12,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:27:12,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:27:12,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:27:12,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:27:12,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:27:12,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:27:12,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:27:12,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:27:12,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:27:12,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:27:12,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:27:12,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:27:12,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:27:12,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:27:12,951 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:27:12,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:27:12,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:27:12,951 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:27:12,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:27:12,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:27:12,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:27:12,952 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_ae454baf-41de-49d1-9d2a-6aee8b0d156f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2022-12-14 10:27:13,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:27:13,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:27:13,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:27:13,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:27:13,170 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:27:13,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2022-12-14 10:27:15,749 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:27:15,996 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:27:15,996 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2022-12-14 10:27:16,007 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/data/258ced76b/d08124ceeb6e449b96c75a1848ce60c2/FLAG4654da00c [2022-12-14 10:27:16,018 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/data/258ced76b/d08124ceeb6e449b96c75a1848ce60c2 [2022-12-14 10:27:16,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:27:16,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:27:16,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:27:16,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:27:16,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:27:16,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e14873b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16, skipping insertion in model container [2022-12-14 10:27:16,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:27:16,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:27:16,219 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_ae454baf-41de-49d1-9d2a-6aee8b0d156f/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2022-12-14 10:27:16,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:27:16,487 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:27:16,498 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_ae454baf-41de-49d1-9d2a-6aee8b0d156f/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2022-12-14 10:27:16,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:27:16,613 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:27:16,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16 WrapperNode [2022-12-14 10:27:16,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:27:16,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:27:16,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:27:16,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:27:16,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,677 INFO L138 Inliner]: procedures = 88, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 743 [2022-12-14 10:27:16,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:27:16,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:27:16,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:27:16,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:27:16,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:27:16,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:27:16,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:27:16,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:27:16,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (1/1) ... [2022-12-14 10:27:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:27:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:16,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:27:16,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:27:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 10:27:16,800 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 10:27:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:27:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 10:27:16,800 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 10:27:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 10:27:16,800 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 10:27:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 10:27:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 10:27:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 10:27:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 10:27:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 10:27:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 10:27:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 10:27:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 10:27:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 10:27:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 10:27:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 10:27:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 10:27:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 10:27:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 10:27:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 10:27:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 10:27:16,803 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 10:27:16,803 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 10:27:16,803 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 10:27:16,803 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 10:27:16,803 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 10:27:16,803 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 10:27:16,803 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 10:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 10:27:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 10:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 10:27:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 10:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 10:27:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:27:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 10:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 10:27:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 10:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 10:27:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 10:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 10:27:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:27:16,806 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 10:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 10:27:16,915 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:27:16,917 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:27:17,667 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:27:18,139 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:27:18,140 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:27:18,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:27:18 BoogieIcfgContainer [2022-12-14 10:27:18,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:27:18,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:27:18,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:27:18,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:27:18,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:27:16" (1/3) ... [2022-12-14 10:27:18,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd08ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:27:18, skipping insertion in model container [2022-12-14 10:27:18,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:27:16" (2/3) ... [2022-12-14 10:27:18,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd08ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:27:18, skipping insertion in model container [2022-12-14 10:27:18,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:27:18" (3/3) ... [2022-12-14 10:27:18,148 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2022-12-14 10:27:18,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:27:18,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:27:18,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:27:18,209 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;@c7966d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:27:18,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:27:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2022-12-14 10:27:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 10:27:18,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:18,226 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:27:18,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1278232445, now seen corresponding path program 1 times [2022-12-14 10:27:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:18,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770829401] [2022-12-14 10:27:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:18,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:18,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:18,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770829401] [2022-12-14 10:27:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770829401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:18,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:18,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:27:18,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938284368] [2022-12-14 10:27:18,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:27:18,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:27:18,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:27:18,782 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 10:27:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:20,569 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2022-12-14 10:27:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:27:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2022-12-14 10:27:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:20,590 INFO L225 Difference]: With dead ends: 1159 [2022-12-14 10:27:20,590 INFO L226 Difference]: Without dead ends: 828 [2022-12-14 10:27:20,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:27:20,599 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 1625 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:20,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 1676 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 10:27:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-12-14 10:27:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2022-12-14 10:27:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2022-12-14 10:27:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2022-12-14 10:27:20,700 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2022-12-14 10:27:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:20,701 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2022-12-14 10:27:20,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 10:27:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2022-12-14 10:27:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 10:27:20,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:20,706 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:27:20,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:27:20,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1979011575, now seen corresponding path program 1 times [2022-12-14 10:27:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70677787] [2022-12-14 10:27:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:20,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70677787] [2022-12-14 10:27:20,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70677787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:20,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:20,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:27:20,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560337642] [2022-12-14 10:27:20,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:20,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:27:20,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:27:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:20,953 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 10:27:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:21,112 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2022-12-14 10:27:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:27:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2022-12-14 10:27:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:21,119 INFO L225 Difference]: With dead ends: 1309 [2022-12-14 10:27:21,119 INFO L226 Difference]: Without dead ends: 849 [2022-12-14 10:27:21,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:21,123 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:21,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2177 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:27:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-12-14 10:27:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2022-12-14 10:27:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2022-12-14 10:27:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2022-12-14 10:27:21,193 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2022-12-14 10:27:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:21,193 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2022-12-14 10:27:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 10:27:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2022-12-14 10:27:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:27:21,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:21,197 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:27:21,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:27:21,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1830835807, now seen corresponding path program 1 times [2022-12-14 10:27:21,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:21,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009887819] [2022-12-14 10:27:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:21,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009887819] [2022-12-14 10:27:21,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009887819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:21,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:21,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:27:21,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477825549] [2022-12-14 10:27:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:21,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:27:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:27:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:27:21,446 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 10:27:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:22,958 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2022-12-14 10:27:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:27:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2022-12-14 10:27:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:22,964 INFO L225 Difference]: With dead ends: 1798 [2022-12-14 10:27:22,964 INFO L226 Difference]: Without dead ends: 1230 [2022-12-14 10:27:22,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:27:22,967 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 2188 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:22,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 1336 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:27:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-12-14 10:27:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2022-12-14 10:27:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2022-12-14 10:27:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2022-12-14 10:27:23,018 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2022-12-14 10:27:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:23,018 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2022-12-14 10:27:23,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 10:27:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2022-12-14 10:27:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 10:27:23,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:23,019 INFO L195 NwaCegarLoop]: trace histogram [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 10:27:23,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:27:23,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1842111713, now seen corresponding path program 1 times [2022-12-14 10:27:23,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:23,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432506118] [2022-12-14 10:27:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:23,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:23,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:23,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432506118] [2022-12-14 10:27:23,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432506118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:23,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:23,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:27:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699320526] [2022-12-14 10:27:23,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:23,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:27:23,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:27:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:23,297 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 10:27:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:23,522 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2022-12-14 10:27:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:27:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-12-14 10:27:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:23,530 INFO L225 Difference]: With dead ends: 2193 [2022-12-14 10:27:23,530 INFO L226 Difference]: Without dead ends: 1136 [2022-12-14 10:27:23,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:27:23,537 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 221 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:23,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1939 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:27:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-12-14 10:27:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-12-14 10:27:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2022-12-14 10:27:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2022-12-14 10:27:23,608 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2022-12-14 10:27:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:23,609 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2022-12-14 10:27:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 10:27:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2022-12-14 10:27:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 10:27:23,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:23,610 INFO L195 NwaCegarLoop]: trace histogram [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 10:27:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:27:23,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1427068531, now seen corresponding path program 1 times [2022-12-14 10:27:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280704453] [2022-12-14 10:27:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:27:23,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280704453] [2022-12-14 10:27:23,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280704453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:23,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:23,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:27:23,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037309044] [2022-12-14 10:27:23,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:23,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:27:23,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:27:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:27:23,809 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 10:27:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:25,107 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2022-12-14 10:27:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:27:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2022-12-14 10:27:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:25,113 INFO L225 Difference]: With dead ends: 2180 [2022-12-14 10:27:25,113 INFO L226 Difference]: Without dead ends: 1324 [2022-12-14 10:27:25,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:27:25,115 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 912 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:25,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1514 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:27:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-12-14 10:27:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2022-12-14 10:27:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2022-12-14 10:27:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2022-12-14 10:27:25,162 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2022-12-14 10:27:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:25,162 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2022-12-14 10:27:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 10:27:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2022-12-14 10:27:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 10:27:25,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:25,164 INFO L195 NwaCegarLoop]: trace histogram [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 10:27:25,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:27:25,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1230770672, now seen corresponding path program 1 times [2022-12-14 10:27:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:25,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996523472] [2022-12-14 10:27:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:27:25,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996523472] [2022-12-14 10:27:25,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996523472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:25,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:25,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:27:25,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464815849] [2022-12-14 10:27:25,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:25,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:27:25,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:25,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:27:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:27:25,333 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:27:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:25,843 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2022-12-14 10:27:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:27:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-12-14 10:27:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:25,848 INFO L225 Difference]: With dead ends: 1235 [2022-12-14 10:27:25,848 INFO L226 Difference]: Without dead ends: 1220 [2022-12-14 10:27:25,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:27:25,850 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 603 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:25,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1680 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:27:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-12-14 10:27:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2022-12-14 10:27:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2022-12-14 10:27:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2022-12-14 10:27:25,903 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 83 [2022-12-14 10:27:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:25,903 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2022-12-14 10:27:25,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:27:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2022-12-14 10:27:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 10:27:25,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:25,904 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:27:25,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:27:25,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash -101032440, now seen corresponding path program 1 times [2022-12-14 10:27:25,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:25,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061764323] [2022-12-14 10:27:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:25,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:27:26,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:26,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061764323] [2022-12-14 10:27:26,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061764323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:26,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:26,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:27:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63080778] [2022-12-14 10:27:26,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:26,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:27:26,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:27:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:27:26,096 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 10:27:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:26,253 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2022-12-14 10:27:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:27:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2022-12-14 10:27:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:26,258 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 10:27:26,258 INFO L226 Difference]: Without dead ends: 1171 [2022-12-14 10:27:26,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:27:26,260 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 41 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:26,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2504 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:27:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-12-14 10:27:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2022-12-14 10:27:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2022-12-14 10:27:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2022-12-14 10:27:26,306 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 88 [2022-12-14 10:27:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:26,307 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2022-12-14 10:27:26,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 10:27:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2022-12-14 10:27:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 10:27:26,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:26,308 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:27:26,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:27:26,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 836632930, now seen corresponding path program 1 times [2022-12-14 10:27:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393238665] [2022-12-14 10:27:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:26,887 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 10:27:26,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393238665] [2022-12-14 10:27:26,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393238665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:26,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:26,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 10:27:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154976038] [2022-12-14 10:27:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:27:26,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:27:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:27:26,889 INFO L87 Difference]: Start difference. First operand 1167 states and 1820 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 10:27:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:28,870 INFO L93 Difference]: Finished difference Result 1532 states and 2393 transitions. [2022-12-14 10:27:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:27:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-12-14 10:27:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:28,878 INFO L225 Difference]: With dead ends: 1532 [2022-12-14 10:27:28,878 INFO L226 Difference]: Without dead ends: 1463 [2022-12-14 10:27:28,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:27:28,880 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 2291 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3549 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 4524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 3549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:28,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2355 Valid, 1826 Invalid, 4524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 3549 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 10:27:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-12-14 10:27:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1282. [2022-12-14 10:27:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 899 states have (on average 1.5294771968854282) internal successors, (1375), 958 states have internal predecessors, (1375), 290 states have call successors, (290), 78 states have call predecessors, (290), 92 states have return successors, (324), 282 states have call predecessors, (324), 285 states have call successors, (324) [2022-12-14 10:27:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1989 transitions. [2022-12-14 10:27:28,941 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1989 transitions. Word has length 95 [2022-12-14 10:27:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:28,942 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1989 transitions. [2022-12-14 10:27:28,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 10:27:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1989 transitions. [2022-12-14 10:27:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 10:27:28,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:28,943 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 10:27:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:27:28,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1148005405, now seen corresponding path program 1 times [2022-12-14 10:27:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967293734] [2022-12-14 10:27:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:29,096 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 10:27:29,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967293734] [2022-12-14 10:27:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967293734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:29,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:29,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:27:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382318928] [2022-12-14 10:27:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:27:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:27:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:29,099 INFO L87 Difference]: Start difference. First operand 1282 states and 1989 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:27:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:30,395 INFO L93 Difference]: Finished difference Result 4199 states and 6618 transitions. [2022-12-14 10:27:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:27:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2022-12-14 10:27:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:30,415 INFO L225 Difference]: With dead ends: 4199 [2022-12-14 10:27:30,416 INFO L226 Difference]: Without dead ends: 2946 [2022-12-14 10:27:30,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 10:27:30,424 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1214 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:30,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 880 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:27:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-12-14 10:27:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2686. [2022-12-14 10:27:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 1935 states have (on average 1.5400516795865633) internal successors, (2980), 2054 states have internal predecessors, (2980), 561 states have call successors, (561), 156 states have call predecessors, (561), 189 states have return successors, (667), 530 states have call predecessors, (667), 556 states have call successors, (667) [2022-12-14 10:27:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 4208 transitions. [2022-12-14 10:27:30,642 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 4208 transitions. Word has length 93 [2022-12-14 10:27:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:30,642 INFO L495 AbstractCegarLoop]: Abstraction has 2686 states and 4208 transitions. [2022-12-14 10:27:30,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:27:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 4208 transitions. [2022-12-14 10:27:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 10:27:30,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:30,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:30,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:27:30,644 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1764941300, now seen corresponding path program 1 times [2022-12-14 10:27:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:30,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229956135] [2022-12-14 10:27:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:27:31,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229956135] [2022-12-14 10:27:31,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229956135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749646056] [2022-12-14 10:27:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:31,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:31,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:31,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:27:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 10:27:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:27:32,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:27:32,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749646056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:32,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:27:32,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 20 [2022-12-14 10:27:32,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374794711] [2022-12-14 10:27:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:32,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:27:32,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:27:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:27:32,411 INFO L87 Difference]: Start difference. First operand 2686 states and 4208 transitions. Second operand has 11 states, 7 states have (on average 8.142857142857142) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 10:27:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:33,900 INFO L93 Difference]: Finished difference Result 5353 states and 8428 transitions. [2022-12-14 10:27:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:27:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 8.142857142857142) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2022-12-14 10:27:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:33,909 INFO L225 Difference]: With dead ends: 5353 [2022-12-14 10:27:33,909 INFO L226 Difference]: Without dead ends: 2690 [2022-12-14 10:27:33,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:27:33,917 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 689 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 3392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:33,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1204 Invalid, 3392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 3061 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:27:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-12-14 10:27:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2637. [2022-12-14 10:27:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 1903 states have (on average 1.5317919075144508) internal successors, (2915), 2021 states have internal predecessors, (2915), 544 states have call successors, (544), 156 states have call predecessors, (544), 189 states have return successors, (651), 514 states have call predecessors, (651), 540 states have call successors, (651) [2022-12-14 10:27:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 4110 transitions. [2022-12-14 10:27:34,067 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 4110 transitions. Word has length 101 [2022-12-14 10:27:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:34,067 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 4110 transitions. [2022-12-14 10:27:34,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 8.142857142857142) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 10:27:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 4110 transitions. [2022-12-14 10:27:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 10:27:34,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:34,069 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:34,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:27:34,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:34,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:34,271 INFO L85 PathProgramCache]: Analyzing trace with hash 533380116, now seen corresponding path program 1 times [2022-12-14 10:27:34,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:34,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6173039] [2022-12-14 10:27:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:34,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 10:27:34,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:34,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6173039] [2022-12-14 10:27:34,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6173039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:27:34,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:27:34,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:27:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792985697] [2022-12-14 10:27:34,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:27:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:27:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:27:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:27:34,576 INFO L87 Difference]: Start difference. First operand 2637 states and 4110 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-12-14 10:27:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:34,811 INFO L93 Difference]: Finished difference Result 2760 states and 4293 transitions. [2022-12-14 10:27:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:27:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 99 [2022-12-14 10:27:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:34,821 INFO L225 Difference]: With dead ends: 2760 [2022-12-14 10:27:34,821 INFO L226 Difference]: Without dead ends: 2746 [2022-12-14 10:27:34,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:27:34,823 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 54 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:34,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2079 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:27:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-12-14 10:27:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2643. [2022-12-14 10:27:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 1909 states have (on average 1.5285489785227868) internal successors, (2918), 2027 states have internal predecessors, (2918), 544 states have call successors, (544), 156 states have call predecessors, (544), 189 states have return successors, (651), 514 states have call predecessors, (651), 540 states have call successors, (651) [2022-12-14 10:27:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 4113 transitions. [2022-12-14 10:27:34,991 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 4113 transitions. Word has length 99 [2022-12-14 10:27:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:34,992 INFO L495 AbstractCegarLoop]: Abstraction has 2643 states and 4113 transitions. [2022-12-14 10:27:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-12-14 10:27:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 4113 transitions. [2022-12-14 10:27:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 10:27:34,994 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:34,994 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:27:34,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -88405218, now seen corresponding path program 1 times [2022-12-14 10:27:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:34,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994203571] [2022-12-14 10:27:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:27:36,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994203571] [2022-12-14 10:27:36,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994203571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005742389] [2022-12-14 10:27:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:36,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:36,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:36,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:27:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:36,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 10:27:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:27:37,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:29:17,315 WARN L233 SmtUtils]: Spent 1.64m on a formula simplification. DAG size of input: 2881 DAG size of output: 101 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 10:30:59,204 WARN L233 SmtUtils]: Spent 1.68m on a formula simplification. DAG size of input: 2881 DAG size of output: 101 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 10:30:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 10:30:59,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005742389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:30:59,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617950117] [2022-12-14 10:30:59,717 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-12-14 10:30:59,717 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:30:59,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:30:59,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:30:59,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:05,121 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 443 for LOIs [2022-12-14 10:31:05,191 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2022-12-14 10:31:12,969 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 10:31:14,312 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 82 for LOIs [2022-12-14 10:31:14,428 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 74 for LOIs [2022-12-14 10:31:14,442 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 10:31:17,939 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 418 for LOIs [2022-12-14 10:31:18,003 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 77 for LOIs [2022-12-14 10:31:18,010 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2022-12-14 10:31:20,517 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs [2022-12-14 10:32:47,621 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 648 for LOIs [2022-12-14 10:32:48,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:32:59,832 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 648 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:33:06,960 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 688 DAG size of output: 529 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:33:29,611 WARN L233 SmtUtils]: Spent 12.75s on a formula simplification. DAG size of input: 821 DAG size of output: 675 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:33:50,604 WARN L233 SmtUtils]: Spent 18.04s on a formula simplification. DAG size of input: 1024 DAG size of output: 673 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:35:33,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59194#(and (= 30 (select |#length| 34)) (not (= ~currentFloorID~0 0)) (= ~landingButtons_spc1_0~0 0) (= (select (select |#memory_int| 23) 0) 32) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= ~floorButtons_3~0 0) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (<= ~currentHeading~0 1) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= 30 (select |#length| 25)) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (not (= ~currentFloorID~0 1)) (= (select |#valid| 27) 1) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= ~calls_3~0 0) (= (select (select |#memory_int| 19) 2) 105) (not (= ~currentFloorID~0 4)) (= (select |#length| 15) 4) (= ~calls_0~0 0) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= ~floorButtons_4~0 0) (= (select (select |#memory_int| 18) 4) 58) (= (select |#length| 35) 9) (= (select |#valid| 18) 1) (= ~calls_1~0 0) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= ~floorButtons_2~0 0) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select |#length| 32) 9) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 36) 25) (not (= ~landingButtons_spc1_1~0 0)) (= ~floorButtons_1~0 0) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= ~floorButtons_0~0 0) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 33) 25) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 21 (select |#length| 30)) (= 112 (select (select |#memory_int| 18) 3)) (= (select |#length| 27) 21) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (not (= ~currentFloorID~0 2)) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 9 (select |#length| 29)) (= 32 (select (select |#memory_int| 7) 3)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (<= 0 ~currentHeading~0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (not (= ~currentFloorID~0 3)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= 30 (select |#length| 28)) (= (select (select |#memory_int| 5) 2) 93) (= (select (select |#memory_int| 14) 0) 32) (= ~calls_2~0 0) (= ~calls_4~0 0) (= 30 (select |#length| 31)) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 9 (select |#length| 26)) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-12-14 10:35:33,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:35:33,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:35:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 39 [2022-12-14 10:35:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219362981] [2022-12-14 10:35:33,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:35:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 10:35:33,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 10:35:33,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=8784, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 10:35:33,740 INFO L87 Difference]: Start difference. First operand 2643 states and 4113 transitions. Second operand has 39 states, 28 states have (on average 5.928571428571429) internal successors, (166), 32 states have internal predecessors, (166), 16 states have call successors, (55), 7 states have call predecessors, (55), 20 states have return successors, (56), 22 states have call predecessors, (56), 15 states have call successors, (56) [2022-12-14 10:35:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:54,618 INFO L93 Difference]: Finished difference Result 14349 states and 22462 transitions. [2022-12-14 10:35:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-14 10:35:54,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 28 states have (on average 5.928571428571429) internal successors, (166), 32 states have internal predecessors, (166), 16 states have call successors, (55), 7 states have call predecessors, (55), 20 states have return successors, (56), 22 states have call predecessors, (56), 15 states have call successors, (56) Word has length 119 [2022-12-14 10:35:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:54,670 INFO L225 Difference]: With dead ends: 14349 [2022-12-14 10:35:54,671 INFO L226 Difference]: Without dead ends: 11738 [2022-12-14 10:35:54,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 304 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13126 ImplicationChecksByTransitivity, 172.7s TimeCoverageRelationStatistics Valid=2960, Invalid=34870, Unknown=0, NotChecked=0, Total=37830 [2022-12-14 10:35:54,686 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 5969 mSDsluCounter, 10450 mSDsCounter, 0 mSdLazyCounter, 29278 mSolverCounterSat, 3883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6015 SdHoareTripleChecker+Valid, 11054 SdHoareTripleChecker+Invalid, 33161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3883 IncrementalHoareTripleChecker+Valid, 29278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:54,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6015 Valid, 11054 Invalid, 33161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3883 Valid, 29278 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-12-14 10:35:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11738 states. [2022-12-14 10:35:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11738 to 10094. [2022-12-14 10:35:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 7357 states have (on average 1.510941960038059) internal successors, (11116), 7800 states have internal predecessors, (11116), 1948 states have call successors, (1948), 619 states have call predecessors, (1948), 788 states have return successors, (2482), 1853 states have call predecessors, (2482), 1944 states have call successors, (2482) [2022-12-14 10:35:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 15546 transitions. [2022-12-14 10:35:55,531 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 15546 transitions. Word has length 119 [2022-12-14 10:35:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:55,531 INFO L495 AbstractCegarLoop]: Abstraction has 10094 states and 15546 transitions. [2022-12-14 10:35:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 28 states have (on average 5.928571428571429) internal successors, (166), 32 states have internal predecessors, (166), 16 states have call successors, (55), 7 states have call predecessors, (55), 20 states have return successors, (56), 22 states have call predecessors, (56), 15 states have call successors, (56) [2022-12-14 10:35:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 15546 transitions. [2022-12-14 10:35:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 10:35:55,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:55,543 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:55,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:35:55,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:35:55,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -522215220, now seen corresponding path program 1 times [2022-12-14 10:35:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:55,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857129353] [2022-12-14 10:35:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 10:35:55,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857129353] [2022-12-14 10:35:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857129353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:35:55,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:35:55,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:35:55,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710687968] [2022-12-14 10:35:55,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:55,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:35:55,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:35:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:35:55,879 INFO L87 Difference]: Start difference. First operand 10094 states and 15546 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 10:35:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:56,873 INFO L93 Difference]: Finished difference Result 21153 states and 32999 transitions. [2022-12-14 10:35:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:35:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 139 [2022-12-14 10:35:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:56,913 INFO L225 Difference]: With dead ends: 21153 [2022-12-14 10:35:56,914 INFO L226 Difference]: Without dead ends: 12264 [2022-12-14 10:35:56,940 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 10:35:56,941 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 461 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:56,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1032 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:35:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2022-12-14 10:35:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 11749. [2022-12-14 10:35:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 8626 states have (on average 1.4581497797356828) internal successors, (12578), 9112 states have internal predecessors, (12578), 2165 states have call successors, (2165), 765 states have call predecessors, (2165), 957 states have return successors, (2929), 2050 states have call predecessors, (2929), 2161 states have call successors, (2929) [2022-12-14 10:35:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17672 transitions. [2022-12-14 10:35:57,914 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17672 transitions. Word has length 139 [2022-12-14 10:35:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:57,914 INFO L495 AbstractCegarLoop]: Abstraction has 11749 states and 17672 transitions. [2022-12-14 10:35:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 10:35:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17672 transitions. [2022-12-14 10:35:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 10:35:57,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:57,921 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:35:57,921 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 922742268, now seen corresponding path program 1 times [2022-12-14 10:35:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:57,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073706167] [2022-12-14 10:35:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 10:35:58,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073706167] [2022-12-14 10:35:58,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073706167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343766606] [2022-12-14 10:35:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:58,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:58,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:58,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae454baf-41de-49d1-9d2a-6aee8b0d156f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:35:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:35:58,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 10:35:58,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 10:35:59,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343766606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:35:59,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935189404] [2022-12-14 10:35:59,012 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2022-12-14 10:35:59,012 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:35:59,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:35:59,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:35:59,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:36:06,196 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 410 for LOIs [2022-12-14 10:36:06,254 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2022-12-14 10:37:14,291 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 681 for LOIs [2022-12-14 10:37:18,803 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2022-12-14 10:37:18,893 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2022-12-14 10:37:18,905 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 10:37:22,389 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 21 for LOIs [2022-12-14 10:37:22,391 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 10:37:22,436 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 50 for LOIs [2022-12-14 10:37:22,445 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 27 for LOIs [2022-12-14 10:37:22,448 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2022-12-14 10:37:25,001 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs