./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:39:39,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:39:39,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:39:39,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:39:39,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:39:39,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:39:39,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:39:39,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:39:39,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:39:39,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:39:39,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:39:39,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:39:39,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:39:39,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:39:39,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:39:39,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:39:39,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:39:39,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:39:39,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:39:39,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:39:39,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:39:39,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:39:39,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:39:39,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:39:39,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:39:39,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:39:39,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:39:39,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:39:39,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:39:39,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:39:39,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:39:39,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:39:39,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:39:39,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:39:39,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:39:39,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:39:39,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:39:39,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:39:39,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:39:39,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:39:39,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:39:39,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:39:39,254 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:39:39,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:39:39,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:39:39,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:39:39,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:39:39,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:39:39,258 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:39:39,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:39:39,259 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:39:39,259 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:39:39,261 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:39:39,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:39:39,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:39:39,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:39:39,262 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:39:39,262 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:39:39,262 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:39:39,263 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:39:39,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:39:39,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:39:39,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:39:39,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:39:39,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:39:39,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:39:39,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:39:39,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:39:39,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:39:39,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:39:39,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:39:39,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:39:39,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:39:39,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:39:39,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:39,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:39:39,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:39:39,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:39:39,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:39:39,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:39:39,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:39:39,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:39:39,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:39:39,273 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_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2022-11-03 02:39:39,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:39:39,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:39:39,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:39:39,698 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:39:39,699 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:39:39,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2022-11-03 02:39:39,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/data/5c9bfd9b8/a404f8ef22cf41a9b2aad5ccb55168c2/FLAG4e989e3c6 [2022-11-03 02:39:40,418 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:39:40,418 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2022-11-03 02:39:40,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/data/5c9bfd9b8/a404f8ef22cf41a9b2aad5ccb55168c2/FLAG4e989e3c6 [2022-11-03 02:39:40,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/data/5c9bfd9b8/a404f8ef22cf41a9b2aad5ccb55168c2 [2022-11-03 02:39:40,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:39:40,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:39:40,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:40,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:39:40,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:39:40,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:40" (1/1) ... [2022-11-03 02:39:40,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5219fe87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:40, skipping insertion in model container [2022-11-03 02:39:40,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:40" (1/1) ... [2022-11-03 02:39:40,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:39:40,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:39:41,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2022-11-03 02:39:41,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:41,376 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:39:41,515 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2022-11-03 02:39:41,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:41,551 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:39:41,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41 WrapperNode [2022-11-03 02:39:41,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:41,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:41,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:39:41,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:39:41,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,699 INFO L138 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 850 [2022-11-03 02:39:41,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:41,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:39:41,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:39:41,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:39:41,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:39:41,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:39:41,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:39:41,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:39:41,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (1/1) ... [2022-11-03 02:39:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:41,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:39:41,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:39:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 02:39:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 02:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:39:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:39:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:39:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:39:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:39:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:39:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:39:41,964 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:39:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:39:41,964 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:39:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:39:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:39:41,965 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:39:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:39:41,965 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:39:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 02:39:41,966 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 02:39:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:39:41,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:39:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:39:41,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:39:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:39:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:39:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:39:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:39:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:39:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:39:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:39:41,968 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:39:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:39:41,968 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:39:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:39:41,969 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:39:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:39:41,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:39:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:39:41,970 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:39:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:39:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:39:41,970 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:39:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:39:41,971 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:39:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:39:41,971 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:39:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:39:41,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:39:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 02:39:41,972 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 02:39:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:39:41,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:39:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:39:41,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:39:42,147 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:39:42,150 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:39:43,551 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:39:44,524 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:39:44,525 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:39:44,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:44 BoogieIcfgContainer [2022-11-03 02:39:44,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:39:44,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:39:44,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:39:44,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:39:44,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:39:40" (1/3) ... [2022-11-03 02:39:44,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655050a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:44, skipping insertion in model container [2022-11-03 02:39:44,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:41" (2/3) ... [2022-11-03 02:39:44,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655050a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:44, skipping insertion in model container [2022-11-03 02:39:44,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:44" (3/3) ... [2022-11-03 02:39:44,546 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2022-11-03 02:39:44,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:39:44,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:39:44,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:39:44,732 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;@bfeca05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:39:44,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:39:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 02:39:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:39:44,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:44,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:44,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1790014537, now seen corresponding path program 1 times [2022-11-03 02:39:44,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:44,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974476750] [2022-11-03 02:39:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:44,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:39:46,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974476750] [2022-11-03 02:39:46,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974476750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:46,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:46,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854139685] [2022-11-03 02:39:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:46,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:46,145 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:39:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:46,900 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2022-11-03 02:39:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:46,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-11-03 02:39:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:46,939 INFO L225 Difference]: With dead ends: 851 [2022-11-03 02:39:46,942 INFO L226 Difference]: Without dead ends: 490 [2022-11-03 02:39:46,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:46,961 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 282 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:46,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2344 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:39:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-03 02:39:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2022-11-03 02:39:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-03 02:39:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2022-11-03 02:39:47,103 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2022-11-03 02:39:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:47,104 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2022-11-03 02:39:47,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:39:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2022-11-03 02:39:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:39:47,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:47,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:47,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:39:47,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash -798954435, now seen corresponding path program 1 times [2022-11-03 02:39:47,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:47,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490320993] [2022-11-03 02:39:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:47,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:47,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:47,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490320993] [2022-11-03 02:39:47,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490320993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:47,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:47,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:39:47,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905481297] [2022-11-03 02:39:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:47,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:39:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:39:47,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:39:47,830 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 02:39:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:51,652 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2022-11-03 02:39:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:39:51,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2022-11-03 02:39:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:51,661 INFO L225 Difference]: With dead ends: 1287 [2022-11-03 02:39:51,661 INFO L226 Difference]: Without dead ends: 930 [2022-11-03 02:39:51,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:39:51,665 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 1736 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:51,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1801 Valid, 2913 Invalid, 4191 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [599 Valid, 3592 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:39:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-03 02:39:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2022-11-03 02:39:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-03 02:39:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2022-11-03 02:39:51,785 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2022-11-03 02:39:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:51,787 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2022-11-03 02:39:51,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 02:39:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2022-11-03 02:39:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:39:51,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:51,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:51,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:39:51,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2051632693, now seen corresponding path program 1 times [2022-11-03 02:39:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:51,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473879626] [2022-11-03 02:39:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:51,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:52,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473879626] [2022-11-03 02:39:52,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473879626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:52,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:52,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:39:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628232210] [2022-11-03 02:39:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:39:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:39:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:52,198 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:39:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:52,504 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2022-11-03 02:39:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-03 02:39:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:52,512 INFO L225 Difference]: With dead ends: 1477 [2022-11-03 02:39:52,512 INFO L226 Difference]: Without dead ends: 963 [2022-11-03 02:39:52,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:52,517 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:52,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3533 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:39:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-03 02:39:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2022-11-03 02:39:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-03 02:39:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2022-11-03 02:39:52,641 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2022-11-03 02:39:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:52,642 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2022-11-03 02:39:52,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:39:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2022-11-03 02:39:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:39:52,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:52,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:52,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:39:52,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash 492286256, now seen corresponding path program 1 times [2022-11-03 02:39:52,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:52,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799526850] [2022-11-03 02:39:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:53,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:53,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799526850] [2022-11-03 02:39:53,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799526850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:53,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:53,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:39:53,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192345269] [2022-11-03 02:39:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:53,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:39:53,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:53,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:39:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:53,093 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:39:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:53,371 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2022-11-03 02:39:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-11-03 02:39:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:53,380 INFO L225 Difference]: With dead ends: 1506 [2022-11-03 02:39:53,380 INFO L226 Difference]: Without dead ends: 978 [2022-11-03 02:39:53,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:53,385 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 41 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:53,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3552 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:39:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-03 02:39:53,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2022-11-03 02:39:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-03 02:39:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2022-11-03 02:39:53,471 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 84 [2022-11-03 02:39:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:53,472 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2022-11-03 02:39:53,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:39:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2022-11-03 02:39:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:39:53,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:53,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:53,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:39:53,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:53,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1679655152, now seen corresponding path program 1 times [2022-11-03 02:39:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:53,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554146978] [2022-11-03 02:39:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:53,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:53,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554146978] [2022-11-03 02:39:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554146978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:53,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:53,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:39:53,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180437592] [2022-11-03 02:39:53,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:53,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:39:53,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:39:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:53,903 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:39:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:54,217 INFO L93 Difference]: Finished difference Result 1511 states and 2417 transitions. [2022-11-03 02:39:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-11-03 02:39:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:54,231 INFO L225 Difference]: With dead ends: 1511 [2022-11-03 02:39:54,231 INFO L226 Difference]: Without dead ends: 981 [2022-11-03 02:39:54,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:54,241 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 41 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:54,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3557 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:39:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-03 02:39:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 901. [2022-11-03 02:39:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 635 states have (on average 1.5748031496062993) internal successors, (1000), 660 states have internal predecessors, (1000), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 216 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-03 02:39:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1434 transitions. [2022-11-03 02:39:54,312 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1434 transitions. Word has length 84 [2022-11-03 02:39:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:54,313 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1434 transitions. [2022-11-03 02:39:54,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:39:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1434 transitions. [2022-11-03 02:39:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:39:54,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:54,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:54,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:39:54,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1136269027, now seen corresponding path program 1 times [2022-11-03 02:39:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709353769] [2022-11-03 02:39:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:54,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:54,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709353769] [2022-11-03 02:39:54,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709353769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:54,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:54,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:39:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655142158] [2022-11-03 02:39:54,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:54,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:39:54,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:39:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:39:54,835 INFO L87 Difference]: Start difference. First operand 901 states and 1434 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 02:39:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:57,896 INFO L93 Difference]: Finished difference Result 2053 states and 3286 transitions. [2022-11-03 02:39:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:39:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2022-11-03 02:39:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:57,912 INFO L225 Difference]: With dead ends: 2053 [2022-11-03 02:39:57,912 INFO L226 Difference]: Without dead ends: 1400 [2022-11-03 02:39:57,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:39:57,921 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 2635 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2800 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:57,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2800 Valid, 1661 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:39:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-11-03 02:39:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1302. [2022-11-03 02:39:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 904 states have (on average 1.5342920353982301) internal successors, (1387), 944 states have internal predecessors, (1387), 306 states have call successors, (306), 77 states have call predecessors, (306), 91 states have return successors, (346), 317 states have call predecessors, (346), 301 states have call successors, (346) [2022-11-03 02:39:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2039 transitions. [2022-11-03 02:39:58,030 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2039 transitions. Word has length 87 [2022-11-03 02:39:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:58,030 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2039 transitions. [2022-11-03 02:39:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 02:39:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2039 transitions. [2022-11-03 02:39:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 02:39:58,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:58,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:39:58,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1430013021, now seen corresponding path program 1 times [2022-11-03 02:39:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:58,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663472696] [2022-11-03 02:39:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:58,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663472696] [2022-11-03 02:39:58,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663472696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:58,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:58,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:39:58,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945061696] [2022-11-03 02:39:58,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:58,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:39:58,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:39:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:39:58,405 INFO L87 Difference]: Start difference. First operand 1302 states and 2039 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:39:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:58,851 INFO L93 Difference]: Finished difference Result 2584 states and 4121 transitions. [2022-11-03 02:39:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2022-11-03 02:39:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:58,864 INFO L225 Difference]: With dead ends: 2584 [2022-11-03 02:39:58,864 INFO L226 Difference]: Without dead ends: 1506 [2022-11-03 02:39:58,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:39:58,873 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 245 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:58,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2660 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:39:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-03 02:39:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-11-03 02:39:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1092 states have (on average 1.5393772893772895) internal successors, (1681), 1138 states have internal predecessors, (1681), 311 states have call successors, (311), 82 states have call predecessors, (311), 102 states have return successors, (351), 322 states have call predecessors, (351), 306 states have call successors, (351) [2022-11-03 02:39:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2343 transitions. [2022-11-03 02:39:59,005 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2343 transitions. Word has length 90 [2022-11-03 02:39:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:59,006 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2343 transitions. [2022-11-03 02:39:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:39:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2343 transitions. [2022-11-03 02:39:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:39:59,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:59,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:39:59,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash 612290836, now seen corresponding path program 1 times [2022-11-03 02:39:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:59,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077549003] [2022-11-03 02:39:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:39:59,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:59,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077549003] [2022-11-03 02:39:59,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077549003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:59,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:59,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:39:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506639564] [2022-11-03 02:39:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:59,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:39:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:39:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:39:59,403 INFO L87 Difference]: Start difference. First operand 1506 states and 2343 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:40:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:02,872 INFO L93 Difference]: Finished difference Result 6203 states and 9924 transitions. [2022-11-03 02:40:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:40:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-11-03 02:40:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:02,921 INFO L225 Difference]: With dead ends: 6203 [2022-11-03 02:40:02,922 INFO L226 Difference]: Without dead ends: 4721 [2022-11-03 02:40:02,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:40:02,939 INFO L413 NwaCegarLoop]: 979 mSDtfsCounter, 2090 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:02,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2168 Valid, 1937 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 02:40:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2022-11-03 02:40:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4347. [2022-11-03 02:40:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3197 states have (on average 1.539255552080075) internal successors, (4921), 3329 states have internal predecessors, (4921), 859 states have call successors, (859), 226 states have call predecessors, (859), 290 states have return successors, (1081), 882 states have call predecessors, (1081), 854 states have call successors, (1081) [2022-11-03 02:40:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 6861 transitions. [2022-11-03 02:40:03,387 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 6861 transitions. Word has length 91 [2022-11-03 02:40:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:03,388 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 6861 transitions. [2022-11-03 02:40:03,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:40:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 6861 transitions. [2022-11-03 02:40:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:40:03,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:03,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:03,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:40:03,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash -133654052, now seen corresponding path program 1 times [2022-11-03 02:40:03,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:03,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655165758] [2022-11-03 02:40:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:03,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:40:03,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655165758] [2022-11-03 02:40:03,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655165758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:03,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:03,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:40:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418593728] [2022-11-03 02:40:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:40:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:40:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:40:03,850 INFO L87 Difference]: Start difference. First operand 4347 states and 6861 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:40:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:06,633 INFO L93 Difference]: Finished difference Result 8235 states and 13096 transitions. [2022-11-03 02:40:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:40:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2022-11-03 02:40:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:06,746 INFO L225 Difference]: With dead ends: 8235 [2022-11-03 02:40:06,747 INFO L226 Difference]: Without dead ends: 4853 [2022-11-03 02:40:06,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:40:06,766 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 973 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:06,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 1872 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:40:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2022-11-03 02:40:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4457. [2022-11-03 02:40:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 3273 states have (on average 1.5346776657500765) internal successors, (5023), 3417 states have internal predecessors, (5023), 868 states have call successors, (868), 241 states have call predecessors, (868), 315 states have return successors, (1121), 888 states have call predecessors, (1121), 863 states have call successors, (1121) [2022-11-03 02:40:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 7012 transitions. [2022-11-03 02:40:07,127 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 7012 transitions. Word has length 92 [2022-11-03 02:40:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:07,129 INFO L495 AbstractCegarLoop]: Abstraction has 4457 states and 7012 transitions. [2022-11-03 02:40:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:40:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 7012 transitions. [2022-11-03 02:40:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 02:40:07,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:07,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:07,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:40:07,134 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1977267992, now seen corresponding path program 1 times [2022-11-03 02:40:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378255728] [2022-11-03 02:40:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:40:07,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378255728] [2022-11-03 02:40:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378255728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:07,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:07,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:40:07,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767299283] [2022-11-03 02:40:07,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:07,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:40:07,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:40:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:07,568 INFO L87 Difference]: Start difference. First operand 4457 states and 7012 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:40:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:08,539 INFO L93 Difference]: Finished difference Result 4551 states and 7164 transitions. [2022-11-03 02:40:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:40:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-03 02:40:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:08,575 INFO L225 Difference]: With dead ends: 4551 [2022-11-03 02:40:08,575 INFO L226 Difference]: Without dead ends: 4536 [2022-11-03 02:40:08,581 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 [2022-11-03 02:40:08,582 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 684 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:08,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1832 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:40:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2022-11-03 02:40:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4463. [2022-11-03 02:40:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3279 states have (on average 1.5336992985666362) internal successors, (5029), 3423 states have internal predecessors, (5029), 868 states have call successors, (868), 241 states have call predecessors, (868), 315 states have return successors, (1121), 888 states have call predecessors, (1121), 863 states have call successors, (1121) [2022-11-03 02:40:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 7018 transitions. [2022-11-03 02:40:09,034 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 7018 transitions. Word has length 96 [2022-11-03 02:40:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:09,035 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 7018 transitions. [2022-11-03 02:40:09,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:40:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 7018 transitions. [2022-11-03 02:40:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:40:09,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:09,039 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:40:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:40:09,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1976842914, now seen corresponding path program 1 times [2022-11-03 02:40:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770993706] [2022-11-03 02:40:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:40:09,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770993706] [2022-11-03 02:40:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770993706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:09,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:09,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:40:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456975269] [2022-11-03 02:40:09,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:09,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:40:09,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:40:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:40:09,522 INFO L87 Difference]: Start difference. First operand 4463 states and 7018 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 02:40:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:10,450 INFO L93 Difference]: Finished difference Result 4916 states and 7709 transitions. [2022-11-03 02:40:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:40:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2022-11-03 02:40:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:10,485 INFO L225 Difference]: With dead ends: 4916 [2022-11-03 02:40:10,485 INFO L226 Difference]: Without dead ends: 4469 [2022-11-03 02:40:10,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:40:10,492 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 319 mSDsluCounter, 3919 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:10,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 4252 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:40:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-11-03 02:40:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4463. [2022-11-03 02:40:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3279 states have (on average 1.5019823116803903) internal successors, (4925), 3423 states have internal predecessors, (4925), 868 states have call successors, (868), 241 states have call predecessors, (868), 315 states have return successors, (1121), 888 states have call predecessors, (1121), 863 states have call successors, (1121) [2022-11-03 02:40:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 6914 transitions. [2022-11-03 02:40:10,883 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 6914 transitions. Word has length 102 [2022-11-03 02:40:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:10,884 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 6914 transitions. [2022-11-03 02:40:10,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 02:40:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 6914 transitions. [2022-11-03 02:40:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:40:10,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:10,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:10,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:40:10,890 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:10,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:10,891 INFO L85 PathProgramCache]: Analyzing trace with hash 826552684, now seen corresponding path program 1 times [2022-11-03 02:40:10,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:10,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843741052] [2022-11-03 02:40:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:10,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:40:11,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:11,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843741052] [2022-11-03 02:40:11,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843741052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:11,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:11,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:40:11,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066450430] [2022-11-03 02:40:11,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:11,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:40:11,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:11,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:40:11,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:11,666 INFO L87 Difference]: Start difference. First operand 4463 states and 6914 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 02:40:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:16,450 INFO L93 Difference]: Finished difference Result 16307 states and 25654 transitions. [2022-11-03 02:40:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:40:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-11-03 02:40:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:16,542 INFO L225 Difference]: With dead ends: 16307 [2022-11-03 02:40:16,542 INFO L226 Difference]: Without dead ends: 11867 [2022-11-03 02:40:16,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:40:16,568 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 2582 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 3658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2646 Valid, 2114 Invalid, 3658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:40:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11867 states. [2022-11-03 02:40:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11867 to 10582. [2022-11-03 02:40:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10582 states, 7735 states have (on average 1.5148028442146089) internal successors, (11717), 8102 states have internal predecessors, (11717), 2158 states have call successors, (2158), 522 states have call predecessors, (2158), 688 states have return successors, (2706), 2092 states have call predecessors, (2706), 2153 states have call successors, (2706) [2022-11-03 02:40:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10582 states to 10582 states and 16581 transitions. [2022-11-03 02:40:17,859 INFO L78 Accepts]: Start accepts. Automaton has 10582 states and 16581 transitions. Word has length 108 [2022-11-03 02:40:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:17,860 INFO L495 AbstractCegarLoop]: Abstraction has 10582 states and 16581 transitions. [2022-11-03 02:40:17,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 02:40:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10582 states and 16581 transitions. [2022-11-03 02:40:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:40:17,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:17,865 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:17,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:40:17,865 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1131127679, now seen corresponding path program 1 times [2022-11-03 02:40:17,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:17,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38044155] [2022-11-03 02:40:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:17,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:40:20,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38044155] [2022-11-03 02:40:20,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38044155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724029335] [2022-11-03 02:40:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:20,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:20,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:20,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:20,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:40:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:40:20,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:40:23,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:40:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724029335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604129685] [2022-11-03 02:40:27,316 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2022-11-03 02:40:27,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:40:27,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:40:27,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:40:27,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:40:35,889 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2022-11-03 02:41:44,108 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-03 02:41:52,099 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2022-11-03 02:41:52,178 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-11-03 02:41:52,194 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2022-11-03 02:41:52,210 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 108 for LOIs [2022-11-03 02:41:52,225 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2022-11-03 02:41:55,896 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 471 for LOIs [2022-11-03 02:41:56,188 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 104 for LOIs [2022-11-03 02:41:56,514 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 99 for LOIs [2022-11-03 02:41:56,526 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2022-11-03 02:41:59,282 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2022-11-03 02:42:09,647 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2022-11-03 02:42:10,174 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:42:27,302 WARN L234 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 656 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:42:37,994 WARN L234 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 696 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:42:46,270 WARN L234 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:42:54,332 WARN L234 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:18,197 WARN L234 SmtUtils]: Spent 21.70s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:36,473 WARN L234 SmtUtils]: Spent 17.31s on a formula simplification. DAG size of input: 902 DAG size of output: 807 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:48,410 WARN L234 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 543 DAG size of output: 481 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:55,404 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 545 DAG size of output: 507 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:02,508 WARN L234 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 548 DAG size of output: 510 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:20,089 WARN L234 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 557 DAG size of output: 487 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:26,539 WARN L234 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 557 DAG size of output: 488 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:33,526 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 560 DAG size of output: 496 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:39,896 WARN L234 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 563 DAG size of output: 492 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:46,309 WARN L234 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 569 DAG size of output: 498 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:52,854 WARN L234 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 585 DAG size of output: 508 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:52,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1604129685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:52,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:45:52,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [20, 12, 12] total 98 [2022-11-03 02:45:52,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619878798] [2022-11-03 02:45:52,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:52,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 02:45:52,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 02:45:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=8837, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:45:52,862 INFO L87 Difference]: Start difference. First operand 10582 states and 16581 transitions. Second operand has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 41 states have internal predecessors, (67), 17 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:45:59,613 WARN L234 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 727 DAG size of output: 649 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:06,170 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 739 DAG size of output: 656 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:12,628 WARN L234 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 744 DAG size of output: 660 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:39,535 WARN L234 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 612 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:45,682 WARN L234 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 644 DAG size of output: 614 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:51,830 WARN L234 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 640 DAG size of output: 610 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:57,637 WARN L234 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 623 DAG size of output: 596 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:03,515 WARN L234 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 629 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:10,554 WARN L234 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 681 DAG size of output: 616 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:17,629 WARN L234 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 684 DAG size of output: 619 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:24,783 WARN L234 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 688 DAG size of output: 623 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:31,867 WARN L234 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 690 DAG size of output: 625 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:15,812 INFO L93 Difference]: Finished difference Result 21258 states and 33329 transitions. [2022-11-03 02:48:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:48:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 41 states have internal predecessors, (67), 17 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-11-03 02:48:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:15,873 INFO L225 Difference]: With dead ends: 21258 [2022-11-03 02:48:15,873 INFO L226 Difference]: Without dead ends: 10696 [2022-11-03 02:48:15,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4374 ImplicationChecksByTransitivity, 318.4s TimeCoverageRelationStatistics Valid=942, Invalid=11940, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:48:15,920 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 188 mSDsluCounter, 8166 mSDsCounter, 0 mSdLazyCounter, 12179 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 8519 SdHoareTripleChecker+Invalid, 12235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 12179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:15,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 8519 Invalid, 12235 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [56 Valid, 12179 Invalid, 0 Unknown, 0 Unchecked, 47.2s Time] [2022-11-03 02:48:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10696 states. [2022-11-03 02:48:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10696 to 10614. [2022-11-03 02:48:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 7758 states have (on average 1.5134055168857954) internal successors, (11741), 8126 states have internal predecessors, (11741), 2162 states have call successors, (2162), 527 states have call predecessors, (2162), 693 states have return successors, (2711), 2095 states have call predecessors, (2711), 2157 states have call successors, (2711) [2022-11-03 02:48:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 16614 transitions. [2022-11-03 02:48:16,828 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 16614 transitions. Word has length 111 [2022-11-03 02:48:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:16,829 INFO L495 AbstractCegarLoop]: Abstraction has 10614 states and 16614 transitions. [2022-11-03 02:48:16,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 41 states have internal predecessors, (67), 17 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:48:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 16614 transitions. [2022-11-03 02:48:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:48:16,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:16,833 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:16,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:17,046 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash 98529616, now seen corresponding path program 1 times [2022-11-03 02:48:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207041543] [2022-11-03 02:48:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:18,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207041543] [2022-11-03 02:48:18,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207041543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:18,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93069891] [2022-11-03 02:48:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:18,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:18,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:19,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f42b8f3e-1883-478b-9e31-6f1572bde507/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:48:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:19,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:48:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:48:21,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:48:23,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93069891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221166198] [2022-11-03 02:48:24,011 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-03 02:48:24,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:24,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:24,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:24,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:29,340 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2022-11-03 02:49:30,731 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-03 02:49:37,965 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2022-11-03 02:49:38,467 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 116 for LOIs [2022-11-03 02:49:38,984 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-11-03 02:49:38,999 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2022-11-03 02:49:39,024 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 93 for LOIs [2022-11-03 02:49:39,040 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2022-11-03 02:49:42,724 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-11-03 02:49:42,984 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2022-11-03 02:49:43,273 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2022-11-03 02:49:43,280 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2022-11-03 02:49:45,867 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs