./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba --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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- 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-b5237d8 [2022-11-22 01:54:34,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:54:34,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:54:34,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:54:34,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:54:34,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:54:34,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:54:34,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:54:34,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:54:34,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:54:34,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:54:34,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:54:34,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:54:34,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:54:34,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:54:34,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:54:34,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:54:34,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:54:34,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:54:34,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:54:34,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:54:34,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:54:34,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:54:34,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:54:34,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:54:34,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:54:34,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:54:34,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:54:34,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:54:34,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:54:34,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:54:34,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:54:34,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:54:34,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:54:34,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:54:34,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:54:34,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:54:34,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:54:34,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:54:34,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:54:34,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:54:34,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:54:34,957 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:54:34,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:54:34,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:54:34,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:54:34,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:54:34,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:54:34,958 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:54:34,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:54:34,959 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:54:34,959 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:54:34,959 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:54:34,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:54:34,959 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:54:34,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:54:34,960 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:54:34,960 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:54:34,960 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:54:34,960 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:54:34,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:54:34,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:54:34,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:54:34,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:54:34,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:54:34,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:54:34,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:54:34,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:54:34,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:54:34,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:54:34,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:54:34,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:54:34,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:54:34,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:54:34,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:34,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:54:34,964 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:54:34,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:54:34,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:54:34,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:54:34,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:54:34,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:54:34,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:54:34,965 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_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2022-11-22 01:54:35,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:54:35,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:54:35,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:54:35,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:54:35,342 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:54:35,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2022-11-22 01:54:38,313 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:54:38,692 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:54:38,693 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2022-11-22 01:54:38,718 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/data/53bd882eb/e2b19eefe17349f49df3ef40aaff48a2/FLAGaa8b67e02 [2022-11-22 01:54:38,732 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/data/53bd882eb/e2b19eefe17349f49df3ef40aaff48a2 [2022-11-22 01:54:38,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:54:38,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:54:38,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:38,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:54:38,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:54:38,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696d5b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38, skipping insertion in model container [2022-11-22 01:54:38,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:54:38,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:54:39,382 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_c6e542b1-94be-4ba7-b275-3ae53dce76bc/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2022-11-22 01:54:39,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:39,522 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:54:39,630 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_c6e542b1-94be-4ba7-b275-3ae53dce76bc/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2022-11-22 01:54:39,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:39,691 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:54:39,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39 WrapperNode [2022-11-22 01:54:39,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:39,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:54:39,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:54:39,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:54:39,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,782 INFO L138 Inliner]: procedures = 96, calls = 347, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1123 [2022-11-22 01:54:39,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:54:39,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:54:39,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:54:39,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:54:39,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:54:39,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:54:39,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:54:39,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:54:39,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (1/1) ... [2022-11-22 01:54:39,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:39,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:54:39,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:54:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-22 01:54:39,958 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-22 01:54:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:54:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:54:39,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:54:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 01:54:39,959 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 01:54:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-22 01:54:39,959 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-22 01:54:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:54:39,960 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 01:54:39,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 01:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:54:39,960 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:54:39,961 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:54:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:54:39,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:54:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:54:39,961 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:54:39,962 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 01:54:39,962 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 01:54:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:54:39,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:54:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:54:39,964 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:54:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:54:39,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:54:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:54:39,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:54:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 01:54:39,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 01:54:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:54:39,967 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:54:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:54:39,968 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:54:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:54:39,968 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:54:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:54:39,968 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:54:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:54:39,969 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:54:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:54:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:54:39,969 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:54:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:54:39,970 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:54:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:54:39,971 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:54:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:54:39,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:54:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:54:39,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:54:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-22 01:54:39,972 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-22 01:54:40,121 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:54:40,138 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:54:41,363 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:54:42,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:54:42,126 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:54:42,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:42 BoogieIcfgContainer [2022-11-22 01:54:42,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:54:42,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:54:42,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:54:42,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:54:42,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:54:38" (1/3) ... [2022-11-22 01:54:42,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1728c51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:42, skipping insertion in model container [2022-11-22 01:54:42,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:39" (2/3) ... [2022-11-22 01:54:42,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1728c51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:42, skipping insertion in model container [2022-11-22 01:54:42,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:42" (3/3) ... [2022-11-22 01:54:42,144 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2022-11-22 01:54:42,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:54:42,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:54:42,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:54:42,262 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;@178e4474, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:54:42,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:54:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-22 01:54:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:54:42,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:42,289 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] [2022-11-22 01:54:42,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1418182962, now seen corresponding path program 1 times [2022-11-22 01:54:42,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:42,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884686582] [2022-11-22 01:54:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:42,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:54:43,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:43,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884686582] [2022-11-22 01:54:43,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884686582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:43,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:43,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:54:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87493265] [2022-11-22 01:54:43,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:54:43,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:54:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:43,535 INFO L87 Difference]: Start difference. First operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-22 01:54:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:46,045 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2022-11-22 01:54:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:54:46,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-22 01:54:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:46,069 INFO L225 Difference]: With dead ends: 1260 [2022-11-22 01:54:46,069 INFO L226 Difference]: Without dead ends: 887 [2022-11-22 01:54:46,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:54:46,080 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1237 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:46,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1121 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:54:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-22 01:54:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2022-11-22 01:54:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 559 states have (on average 1.5992844364937389) internal successors, (894), 589 states have internal predecessors, (894), 195 states have call successors, (195), 44 states have call predecessors, (195), 45 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2022-11-22 01:54:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2022-11-22 01:54:46,246 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2022-11-22 01:54:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:46,252 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2022-11-22 01:54:46,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-22 01:54:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2022-11-22 01:54:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 01:54:46,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:46,270 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:46,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:54:46,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash -764672404, now seen corresponding path program 1 times [2022-11-22 01:54:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221499582] [2022-11-22 01:54:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:54:46,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:46,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221499582] [2022-11-22 01:54:46,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221499582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:46,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:46,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:54:46,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363718122] [2022-11-22 01:54:46,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:54:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:54:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:54:46,892 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 01:54:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:50,720 INFO L93 Difference]: Finished difference Result 2754 states and 4471 transitions. [2022-11-22 01:54:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:54:50,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2022-11-22 01:54:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:50,735 INFO L225 Difference]: With dead ends: 2754 [2022-11-22 01:54:50,735 INFO L226 Difference]: Without dead ends: 1977 [2022-11-22 01:54:50,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:54:50,741 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1367 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 5194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:50,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2161 Invalid, 5194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [708 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 01:54:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-11-22 01:54:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1790. [2022-11-22 01:54:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1214 states have (on average 1.57166392092257) internal successors, (1908), 1286 states have internal predecessors, (1908), 482 states have call successors, (482), 81 states have call predecessors, (482), 93 states have return successors, (501), 455 states have call predecessors, (501), 477 states have call successors, (501) [2022-11-22 01:54:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2891 transitions. [2022-11-22 01:54:50,920 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2891 transitions. Word has length 98 [2022-11-22 01:54:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:50,921 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 2891 transitions. [2022-11-22 01:54:50,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 01:54:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2891 transitions. [2022-11-22 01:54:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 01:54:50,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:50,926 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:50,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:54:50,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1174486611, now seen corresponding path program 1 times [2022-11-22 01:54:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776680048] [2022-11-22 01:54:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:54:51,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:51,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776680048] [2022-11-22 01:54:51,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776680048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:51,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:51,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:54:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695339596] [2022-11-22 01:54:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:54:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:54:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:54:51,439 INFO L87 Difference]: Start difference. First operand 1790 states and 2891 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 01:54:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:53,990 INFO L93 Difference]: Finished difference Result 4525 states and 7322 transitions. [2022-11-22 01:54:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:54:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2022-11-22 01:54:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:54,033 INFO L225 Difference]: With dead ends: 4525 [2022-11-22 01:54:54,034 INFO L226 Difference]: Without dead ends: 2760 [2022-11-22 01:54:54,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:54:54,042 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1165 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:54,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 1661 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:54:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2022-11-22 01:54:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2642. [2022-11-22 01:54:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1818 states have (on average 1.5792079207920793) internal successors, (2871), 1917 states have internal predecessors, (2871), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2022-11-22 01:54:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4262 transitions. [2022-11-22 01:54:54,244 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4262 transitions. Word has length 99 [2022-11-22 01:54:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:54,244 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 4262 transitions. [2022-11-22 01:54:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 01:54:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4262 transitions. [2022-11-22 01:54:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 01:54:54,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:54,248 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:54,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:54:54,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1902471947, now seen corresponding path program 1 times [2022-11-22 01:54:54,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:54,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598998046] [2022-11-22 01:54:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:54:54,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598998046] [2022-11-22 01:54:54,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598998046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:54,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:54,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:54:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806874219] [2022-11-22 01:54:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:54:54,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:54:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:54,683 INFO L87 Difference]: Start difference. First operand 2642 states and 4262 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:54:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:55,508 INFO L93 Difference]: Finished difference Result 2743 states and 4428 transitions. [2022-11-22 01:54:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:54:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2022-11-22 01:54:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:55,536 INFO L225 Difference]: With dead ends: 2743 [2022-11-22 01:54:55,537 INFO L226 Difference]: Without dead ends: 2728 [2022-11-22 01:54:55,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:54:55,550 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 698 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:55,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 1872 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:54:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-11-22 01:54:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2648. [2022-11-22 01:54:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1824 states have (on average 1.5773026315789473) internal successors, (2877), 1923 states have internal predecessors, (2877), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2022-11-22 01:54:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4268 transitions. [2022-11-22 01:54:55,788 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4268 transitions. Word has length 103 [2022-11-22 01:54:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:55,790 INFO L495 AbstractCegarLoop]: Abstraction has 2648 states and 4268 transitions. [2022-11-22 01:54:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:54:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4268 transitions. [2022-11-22 01:54:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 01:54:55,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:55,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:55,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:54:55,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 479288806, now seen corresponding path program 1 times [2022-11-22 01:54:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:55,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399022040] [2022-11-22 01:54:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:54:56,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:56,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399022040] [2022-11-22 01:54:56,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399022040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:56,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:56,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:54:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664603108] [2022-11-22 01:54:56,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:56,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:54:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:54:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:54:56,508 INFO L87 Difference]: Start difference. First operand 2648 states and 4268 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-22 01:55:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:03,089 INFO L93 Difference]: Finished difference Result 3073 states and 4910 transitions. [2022-11-22 01:55:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 01:55:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2022-11-22 01:55:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:03,117 INFO L225 Difference]: With dead ends: 3073 [2022-11-22 01:55:03,118 INFO L226 Difference]: Without dead ends: 3056 [2022-11-22 01:55:03,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:55:03,123 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 2671 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 8794 mSolverCounterSat, 1581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2697 SdHoareTripleChecker+Valid, 3942 SdHoareTripleChecker+Invalid, 10375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1581 IncrementalHoareTripleChecker+Valid, 8794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:03,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2697 Valid, 3942 Invalid, 10375 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1581 Valid, 8794 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-22 01:55:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-11-22 01:55:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2836. [2022-11-22 01:55:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1966 states have (on average 1.5768056968463886) internal successors, (3100), 2063 states have internal predecessors, (3100), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2022-11-22 01:55:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4529 transitions. [2022-11-22 01:55:03,391 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4529 transitions. Word has length 108 [2022-11-22 01:55:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:03,392 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 4529 transitions. [2022-11-22 01:55:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-22 01:55:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4529 transitions. [2022-11-22 01:55:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-22 01:55:03,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:03,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:55:03,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2043443387, now seen corresponding path program 1 times [2022-11-22 01:55:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:03,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982068195] [2022-11-22 01:55:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:55:07,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982068195] [2022-11-22 01:55:07,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982068195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451307701] [2022-11-22 01:55:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:07,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:07,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:55:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:55:08,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:55:08,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:08,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451307701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:08,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:55:08,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [23] total 25 [2022-11-22 01:55:08,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814095631] [2022-11-22 01:55:08,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:08,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:55:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:55:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:55:08,131 INFO L87 Difference]: Start difference. First operand 2836 states and 4529 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-22 01:55:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:08,507 INFO L93 Difference]: Finished difference Result 2999 states and 4796 transitions. [2022-11-22 01:55:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:55:08,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2022-11-22 01:55:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:08,529 INFO L225 Difference]: With dead ends: 2999 [2022-11-22 01:55:08,529 INFO L226 Difference]: Without dead ends: 2984 [2022-11-22 01:55:08,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:55:08,533 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 47 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:08,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1766 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:55:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-11-22 01:55:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2850. [2022-11-22 01:55:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1980 states have (on average 1.5727272727272728) internal successors, (3114), 2077 states have internal predecessors, (3114), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2022-11-22 01:55:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 4543 transitions. [2022-11-22 01:55:08,784 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 4543 transitions. Word has length 115 [2022-11-22 01:55:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:08,786 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 4543 transitions. [2022-11-22 01:55:08,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-22 01:55:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 4543 transitions. [2022-11-22 01:55:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-22 01:55:08,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:08,792 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:08,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:09,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:09,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash 210888616, now seen corresponding path program 1 times [2022-11-22 01:55:09,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:09,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93320981] [2022-11-22 01:55:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 01:55:11,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:11,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93320981] [2022-11-22 01:55:11,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93320981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:11,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151607926] [2022-11-22 01:55:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:11,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:11,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:11,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6e542b1-94be-4ba7-b275-3ae53dce76bc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:55:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:11,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 01:55:11,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 01:55:12,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:04,464 WARN L233 SmtUtils]: Spent 49.49s on a formula simplification. DAG size of input: 1449 DAG size of output: 59 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-22 01:56:54,052 WARN L233 SmtUtils]: Spent 48.97s on a formula simplification. DAG size of input: 1449 DAG size of output: 59 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-22 01:56:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 01:56:54,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151607926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158104926] [2022-11-22 01:56:54,834 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2022-11-22 01:56:54,834 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:54,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:54,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:54,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:04,000 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 451 for LOIs [2022-11-22 01:57:04,098 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 594 for LOIs [2022-11-22 01:57:14,317 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 594 for LOIs [2022-11-22 01:57:20,864 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 578 for LOIs [2022-11-22 01:57:31,544 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 453 for LOIs [2022-11-22 01:57:34,112 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 509 for LOIs [2022-11-22 01:57:37,051 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 59 for LOIs [2022-11-22 01:57:37,074 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 445 for LOIs [2022-11-22 01:57:37,172 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 50 for LOIs [2022-11-22 01:57:37,177 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 599 for LOIs [2022-11-22 01:57:41,837 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 428 for LOIs [2022-11-22 01:57:41,912 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 461 for LOIs [2022-11-22 01:57:43,028 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 457 for LOIs [2022-11-22 01:57:43,123 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 562 for LOIs [2022-11-22 01:57:46,613 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 841 for LOIs [2022-11-22 02:02:36,559 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 668 for LOIs [2022-11-22 02:02:37,157 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:02:59,517 WARN L233 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 668 DAG size of output: 527 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:03:11,520 WARN L233 SmtUtils]: Spent 11.39s on a formula simplification. DAG size of input: 708 DAG size of output: 541 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:03:20,160 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 681 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:03:28,788 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 681 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:03:45,543 WARN L233 SmtUtils]: Spent 15.93s on a formula simplification. DAG size of input: 841 DAG size of output: 610 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:04:23,484 WARN L233 SmtUtils]: Spent 29.59s on a formula simplification. DAG size of input: 1246 DAG size of output: 710 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:03,093 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 636 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:09,875 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 636 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:19,599 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 509 DAG size of output: 477 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:27,358 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 618 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:33,790 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 618 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:40,375 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 620 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:47,688 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 624 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:54,403 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 624 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:01,321 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 630 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:08,230 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 635 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:15,088 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 631 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:52,344 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 643 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:59,617 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 643 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)