./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:14:40,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:14:40,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:14:40,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:14:40,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:14:40,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:14:40,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:14:40,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:14:40,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:14:40,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:14:40,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:14:40,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:14:40,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:14:40,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:14:40,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:14:40,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:14:40,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:14:40,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:14:40,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:14:40,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:14:40,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:14:40,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:14:40,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:14:40,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:14:40,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:14:40,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:14:40,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:14:40,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:14:40,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:14:40,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:14:40,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:14:40,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:14:40,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:14:40,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:14:40,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:14:40,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:14:40,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:14:40,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:14:40,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:14:40,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:14:40,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:14:40,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:14:40,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:14:40,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:14:40,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:14:40,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:14:40,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:14:40,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:14:40,276 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:14:40,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:14:40,276 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:14:40,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:14:40,277 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:14:40,277 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:14:40,277 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:14:40,277 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:14:40,277 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:14:40,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:14:40,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:14:40,278 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:14:40,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:14:40,278 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:14:40,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:14:40,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:14:40,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:14:40,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:14:40,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:14:40,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:14:40,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:14:40,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:14:40,281 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:14:40,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:14:40,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:14:40,281 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:14:40,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:14:40,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:14:40,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:14:40,282 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_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2022-12-14 11:14:40,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:14:40,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:14:40,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:14:40,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:14:40,468 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:14:40,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2022-12-14 11:14:43,026 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:14:43,240 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:14:43,240 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2022-12-14 11:14:43,253 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/data/5d9c75fd6/06be244b15ce46a1b0d55ca2035d9286/FLAGd1fa7a208 [2022-12-14 11:14:43,597 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/data/5d9c75fd6/06be244b15ce46a1b0d55ca2035d9286 [2022-12-14 11:14:43,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:14:43,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:14:43,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:14:43,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:14:43,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:14:43,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:14:43" (1/1) ... [2022-12-14 11:14:43,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a9a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43, skipping insertion in model container [2022-12-14 11:14:43,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:14:43" (1/1) ... [2022-12-14 11:14:43,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:14:43,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:14:43,816 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2022-12-14 11:14:44,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:14:44,076 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:14:44,089 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2022-12-14 11:14:44,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:14:44,226 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:14:44,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44 WrapperNode [2022-12-14 11:14:44,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:14:44,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:14:44,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:14:44,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:14:44,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,291 INFO L138 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1010 [2022-12-14 11:14:44,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:14:44,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:14:44,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:14:44,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:14:44,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,327 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:14:44,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:14:44,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:14:44,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:14:44,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (1/1) ... [2022-12-14 11:14:44,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:14:44,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:44,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:14:44,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 11:14:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:14:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:14:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:14:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:14:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:14:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:14:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 11:14:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 11:14:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 11:14:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 11:14:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:14:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:14:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:14:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:14:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:14:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:14:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 11:14:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 11:14:44,521 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:14:44,523 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:14:45,334 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:14:45,793 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:14:45,793 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:14:45,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:14:45 BoogieIcfgContainer [2022-12-14 11:14:45,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:14:45,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:14:45,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:14:45,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:14:45,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:14:43" (1/3) ... [2022-12-14 11:14:45,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27522c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:14:45, skipping insertion in model container [2022-12-14 11:14:45,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:44" (2/3) ... [2022-12-14 11:14:45,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27522c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:14:45, skipping insertion in model container [2022-12-14 11:14:45,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:14:45" (3/3) ... [2022-12-14 11:14:45,802 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2022-12-14 11:14:45,816 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:14:45,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:14:45,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:14:45,862 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;@74bbdb32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:14:45,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:14:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2022-12-14 11:14:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:14:45,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:45,874 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 11:14:45,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -230513500, now seen corresponding path program 1 times [2022-12-14 11:14:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:45,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901560048] [2022-12-14 11:14:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:14:46,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901560048] [2022-12-14 11:14:46,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901560048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:14:46,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010859391] [2022-12-14 11:14:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:46,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:46,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:14:46,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:14:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:46,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:14:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:14:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:14:46,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:14:46,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010859391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:46,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:14:46,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 11:14:46,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656533588] [2022-12-14 11:14:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:46,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:14:46,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:14:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:46,663 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:14:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:46,914 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2022-12-14 11:14:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:14:46,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-12-14 11:14:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:46,929 INFO L225 Difference]: With dead ends: 1225 [2022-12-14 11:14:46,930 INFO L226 Difference]: Without dead ends: 793 [2022-12-14 11:14:46,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:46,937 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 578 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:46,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1385 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:14:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-12-14 11:14:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2022-12-14 11:14:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 523 states have (on average 1.5468451242829828) internal successors, (809), 558 states have internal predecessors, (809), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2022-12-14 11:14:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2022-12-14 11:14:47,014 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2022-12-14 11:14:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:47,014 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2022-12-14 11:14:47,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:14:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2022-12-14 11:14:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:14:47,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:47,016 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 11:14:47,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:14:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:47,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash 399834051, now seen corresponding path program 1 times [2022-12-14 11:14:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:47,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152225357] [2022-12-14 11:14:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:47,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:14:47,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152225357] [2022-12-14 11:14:47,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152225357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:14:47,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877495286] [2022-12-14 11:14:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:47,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:14:47,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:14:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:14:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:14:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:14:47,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:14:47,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877495286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:47,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:14:47,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 11:14:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158662215] [2022-12-14 11:14:47,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:47,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:14:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:47,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:14:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:47,668 INFO L87 Difference]: Start difference. First operand 781 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 11:14:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:47,887 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2022-12-14 11:14:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:14:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2022-12-14 11:14:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:47,898 INFO L225 Difference]: With dead ends: 1915 [2022-12-14 11:14:47,898 INFO L226 Difference]: Without dead ends: 1146 [2022-12-14 11:14:47,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:47,905 INFO L413 NwaCegarLoop]: 1077 mSDtfsCounter, 633 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:47,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1615 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:14:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-12-14 11:14:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2022-12-14 11:14:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 755 states have (on average 1.5536423841059603) internal successors, (1173), 807 states have internal predecessors, (1173), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2022-12-14 11:14:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2022-12-14 11:14:47,980 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2022-12-14 11:14:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:47,981 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2022-12-14 11:14:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 11:14:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2022-12-14 11:14:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:14:47,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:47,983 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 11:14:47,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:14:48,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 11:14:48,184 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1470437176, now seen corresponding path program 1 times [2022-12-14 11:14:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:48,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524348125] [2022-12-14 11:14:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:14:48,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524348125] [2022-12-14 11:14:48,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524348125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:48,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:14:48,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:14:48,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464009528] [2022-12-14 11:14:48,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:48,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:14:48,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:14:48,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:14:48,423 INFO L87 Difference]: Start difference. First operand 1122 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:14:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:48,683 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2022-12-14 11:14:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:14:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-12-14 11:14:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:48,692 INFO L225 Difference]: With dead ends: 3336 [2022-12-14 11:14:48,693 INFO L226 Difference]: Without dead ends: 2226 [2022-12-14 11:14:48,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:14:48,697 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 633 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:48,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1390 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:14:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-12-14 11:14:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2022-12-14 11:14:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1461 states have (on average 1.57015742642026) internal successors, (2294), 1542 states have internal predecessors, (2294), 515 states have call successors, (515), 130 states have call predecessors, (515), 131 states have return successors, (550), 480 states have call predecessors, (550), 511 states have call successors, (550) [2022-12-14 11:14:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2022-12-14 11:14:48,795 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2022-12-14 11:14:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:48,795 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2022-12-14 11:14:48,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:14:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2022-12-14 11:14:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 11:14:48,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:48,806 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:48,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:14:48,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash -685233436, now seen corresponding path program 1 times [2022-12-14 11:14:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414926399] [2022-12-14 11:14:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:48,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:14:49,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:49,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414926399] [2022-12-14 11:14:49,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414926399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:49,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:14:49,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:14:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336904831] [2022-12-14 11:14:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:49,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:14:49,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:14:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:14:49,032 INFO L87 Difference]: Start difference. First operand 2108 states and 3359 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:14:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:49,367 INFO L93 Difference]: Finished difference Result 4905 states and 7770 transitions. [2022-12-14 11:14:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:14:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 93 [2022-12-14 11:14:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:49,388 INFO L225 Difference]: With dead ends: 4905 [2022-12-14 11:14:49,388 INFO L226 Difference]: Without dead ends: 2809 [2022-12-14 11:14:49,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:14:49,401 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 468 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:49,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1786 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:14:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-12-14 11:14:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2765. [2022-12-14 11:14:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 1899 states have (on average 1.517114270668773) internal successors, (2881), 1987 states have internal predecessors, (2881), 662 states have call successors, (662), 188 states have call predecessors, (662), 203 states have return successors, (790), 631 states have call predecessors, (790), 656 states have call successors, (790) [2022-12-14 11:14:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4333 transitions. [2022-12-14 11:14:49,577 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4333 transitions. Word has length 93 [2022-12-14 11:14:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:49,577 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 4333 transitions. [2022-12-14 11:14:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:14:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4333 transitions. [2022-12-14 11:14:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 11:14:49,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:49,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:14:49,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -381782100, now seen corresponding path program 1 times [2022-12-14 11:14:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512763362] [2022-12-14 11:14:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:14:49,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512763362] [2022-12-14 11:14:49,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512763362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:49,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:14:49,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:14:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866248118] [2022-12-14 11:14:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:14:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:14:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:14:49,924 INFO L87 Difference]: Start difference. First operand 2765 states and 4333 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:14:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:50,753 INFO L93 Difference]: Finished difference Result 7201 states and 11765 transitions. [2022-12-14 11:14:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:14:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-12-14 11:14:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:50,789 INFO L225 Difference]: With dead ends: 7201 [2022-12-14 11:14:50,789 INFO L226 Difference]: Without dead ends: 4448 [2022-12-14 11:14:50,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:14:50,812 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 707 mSDsluCounter, 2768 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:50,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 3567 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:14:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-12-14 11:14:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4035. [2022-12-14 11:14:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 2777 states have (on average 1.5084623694634498) internal successors, (4189), 2916 states have internal predecessors, (4189), 955 states have call successors, (955), 279 states have call predecessors, (955), 302 states have return successors, (1236), 905 states have call predecessors, (1236), 947 states have call successors, (1236) [2022-12-14 11:14:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6380 transitions. [2022-12-14 11:14:51,076 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6380 transitions. Word has length 94 [2022-12-14 11:14:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:51,076 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6380 transitions. [2022-12-14 11:14:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:14:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6380 transitions. [2022-12-14 11:14:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 11:14:51,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:51,080 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:51,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:14:51,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2086977487, now seen corresponding path program 1 times [2022-12-14 11:14:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138083777] [2022-12-14 11:14:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:51,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:14:51,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138083777] [2022-12-14 11:14:51,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138083777] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:14:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223215023] [2022-12-14 11:14:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:51,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:51,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:14:51,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:14:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:14:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:14:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:14:51,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:14:51,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223215023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:51,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:14:51,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 11:14:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270673989] [2022-12-14 11:14:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:51,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:14:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:14:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:14:51,653 INFO L87 Difference]: Start difference. First operand 4035 states and 6380 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 11:14:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:52,570 INFO L93 Difference]: Finished difference Result 10586 states and 17287 transitions. [2022-12-14 11:14:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:14:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-12-14 11:14:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:52,615 INFO L225 Difference]: With dead ends: 10586 [2022-12-14 11:14:52,615 INFO L226 Difference]: Without dead ends: 6563 [2022-12-14 11:14:52,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:14:52,643 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 562 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:52,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 3054 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:14:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2022-12-14 11:14:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6332. [2022-12-14 11:14:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 4360 states have (on average 1.4697247706422019) internal successors, (6408), 4591 states have internal predecessors, (6408), 1486 states have call successors, (1486), 459 states have call predecessors, (1486), 485 states have return successors, (1983), 1387 states have call predecessors, (1983), 1475 states have call successors, (1983) [2022-12-14 11:14:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 9877 transitions. [2022-12-14 11:14:52,947 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 9877 transitions. Word has length 95 [2022-12-14 11:14:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:52,947 INFO L495 AbstractCegarLoop]: Abstraction has 6332 states and 9877 transitions. [2022-12-14 11:14:52,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 11:14:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 9877 transitions. [2022-12-14 11:14:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 11:14:52,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:52,951 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:52,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 11:14:53,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:14:53,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:53,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1508142962, now seen corresponding path program 1 times [2022-12-14 11:14:53,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:53,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282919120] [2022-12-14 11:14:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:53,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:14:53,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:53,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282919120] [2022-12-14 11:14:53,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282919120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:14:53,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176872718] [2022-12-14 11:14:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:53,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:53,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:53,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:14:53,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:14:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:14:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:14:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:14:53,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:14:53,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176872718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:53,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:14:53,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 11:14:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870631011] [2022-12-14 11:14:53,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:14:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:14:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:53,636 INFO L87 Difference]: Start difference. First operand 6332 states and 9877 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 11:14:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:54,034 INFO L93 Difference]: Finished difference Result 14110 states and 22337 transitions. [2022-12-14 11:14:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:14:54,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-12-14 11:14:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:54,072 INFO L225 Difference]: With dead ends: 14110 [2022-12-14 11:14:54,072 INFO L226 Difference]: Without dead ends: 7790 [2022-12-14 11:14:54,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:54,114 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 594 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:54,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1359 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:14:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-12-14 11:14:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6225. [2022-12-14 11:14:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6225 states, 4288 states have (on average 1.4640858208955223) internal successors, (6278), 4517 states have internal predecessors, (6278), 1466 states have call successors, (1466), 450 states have call predecessors, (1466), 470 states have return successors, (1907), 1363 states have call predecessors, (1907), 1455 states have call successors, (1907) [2022-12-14 11:14:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 9651 transitions. [2022-12-14 11:14:54,441 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 9651 transitions. Word has length 94 [2022-12-14 11:14:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:54,441 INFO L495 AbstractCegarLoop]: Abstraction has 6225 states and 9651 transitions. [2022-12-14 11:14:54,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 11:14:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 9651 transitions. [2022-12-14 11:14:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 11:14:54,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:54,444 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:54,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:14:54,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:54,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:14:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1114515597, now seen corresponding path program 1 times [2022-12-14 11:14:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:54,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21430831] [2022-12-14 11:14:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:54,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:14:55,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21430831] [2022-12-14 11:14:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21430831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:14:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087292501] [2022-12-14 11:14:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:55,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:55,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:14:55,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:14:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:55,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:14:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:14:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:14:55,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:14:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:14:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087292501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:14:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400061760] [2022-12-14 11:14:55,794 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-12-14 11:14:55,794 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:14:55,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:14:55,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:14:55,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:15:00,048 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 11:15:07,218 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-12-14 11:15:07,597 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 11:15:09,808 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 11:15:10,025 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 11:15:10,106 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 11:15:10,185 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 11:15:13,835 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 11:15:14,422 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 11:15:14,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:16:33,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1400061760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:33,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:16:33,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-12-14 11:16:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160352022] [2022-12-14 11:16:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 11:16:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 11:16:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 11:16:33,448 INFO L87 Difference]: Start difference. First operand 6225 states and 9651 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-12-14 11:17:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:26,562 INFO L93 Difference]: Finished difference Result 12589 states and 19521 transitions. [2022-12-14 11:17:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 11:17:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-12-14 11:17:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:26,584 INFO L225 Difference]: With dead ends: 12589 [2022-12-14 11:17:26,584 INFO L226 Difference]: Without dead ends: 6376 [2022-12-14 11:17:26,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 99.7s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:17:26,602 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 295 mSDsluCounter, 3543 mSDsCounter, 0 mSdLazyCounter, 7878 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 4165 SdHoareTripleChecker+Invalid, 7963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 7878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:26,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 4165 Invalid, 7963 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [85 Valid, 7878 Invalid, 0 Unknown, 0 Unchecked, 31.9s Time] [2022-12-14 11:17:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2022-12-14 11:17:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6297. [2022-12-14 11:17:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6297 states, 4338 states have (on average 1.4603503918856615) internal successors, (6335), 4566 states have internal predecessors, (6335), 1481 states have call successors, (1481), 459 states have call predecessors, (1481), 477 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2022-12-14 11:17:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 9739 transitions. [2022-12-14 11:17:26,961 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 9739 transitions. Word has length 100 [2022-12-14 11:17:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 6297 states and 9739 transitions. [2022-12-14 11:17:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-12-14 11:17:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 9739 transitions. [2022-12-14 11:17:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 11:17:26,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:26,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:26,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:17:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:27,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash -882197264, now seen corresponding path program 1 times [2022-12-14 11:17:27,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:27,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152025361] [2022-12-14 11:17:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:27,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:17:27,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152025361] [2022-12-14 11:17:27,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152025361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678270094] [2022-12-14 11:17:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:27,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:27,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:17:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:17:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:17:27,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:17:28,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678270094] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:17:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000112608] [2022-12-14 11:17:28,072 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-12-14 11:17:28,072 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:17:28,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:17:28,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:17:28,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:17:31,875 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 11:17:41,123 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-12-14 11:17:41,133 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 11:17:43,289 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 11:17:43,500 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 11:17:43,577 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 11:17:43,656 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 11:17:47,193 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 11:17:47,786 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 11:17:47,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:19:08,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2000112608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:19:08,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:19:08,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-12-14 11:19:08,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490984615] [2022-12-14 11:19:08,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:19:08,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 11:19:08,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 11:19:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 11:19:08,251 INFO L87 Difference]: Start difference. First operand 6297 states and 9739 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 11:20:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:20:06,512 INFO L93 Difference]: Finished difference Result 12567 states and 19482 transitions. [2022-12-14 11:20:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 11:20:06,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2022-12-14 11:20:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:20:06,532 INFO L225 Difference]: With dead ends: 12567 [2022-12-14 11:20:06,532 INFO L226 Difference]: Without dead ends: 6366 [2022-12-14 11:20:06,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 100.5s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:20:06,547 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 146 mSDsluCounter, 5247 mSDsCounter, 0 mSdLazyCounter, 9229 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 9258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 9229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:20:06,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 5864 Invalid, 9258 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 9229 Invalid, 0 Unknown, 0 Unchecked, 37.6s Time] [2022-12-14 11:20:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-12-14 11:20:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6299. [2022-12-14 11:20:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 4339 states have (on average 1.460013828070984) internal successors, (6335), 4567 states have internal predecessors, (6335), 1481 states have call successors, (1481), 460 states have call predecessors, (1481), 478 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2022-12-14 11:20:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 9739 transitions. [2022-12-14 11:20:06,892 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 9739 transitions. Word has length 106 [2022-12-14 11:20:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:20:06,892 INFO L495 AbstractCegarLoop]: Abstraction has 6299 states and 9739 transitions. [2022-12-14 11:20:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 11:20:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 9739 transitions. [2022-12-14 11:20:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 11:20:06,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:20:06,894 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:20:06,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 11:20:07,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:20:07,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:20:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:20:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1400866723, now seen corresponding path program 1 times [2022-12-14 11:20:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:20:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733596581] [2022-12-14 11:20:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:20:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 11:20:07,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:20:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733596581] [2022-12-14 11:20:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733596581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:20:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495118273] [2022-12-14 11:20:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:20:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:20:07,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:20:07,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:20:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:20:07,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:20:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:20:07,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:20:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 11:20:08,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495118273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:20:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382141530] [2022-12-14 11:20:08,013 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-12-14 11:20:08,013 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:20:08,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:20:08,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:20:08,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:20:11,884 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 11:20:23,919 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-12-14 11:20:24,149 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 11:20:26,334 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 11:20:26,538 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 11:20:26,616 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 11:20:26,694 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 11:20:30,991 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 11:20:31,578 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 11:20:31,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:22:06,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1382141530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:06,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:22:06,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-12-14 11:22:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199114950] [2022-12-14 11:22:06,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 11:22:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 11:22:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:22:06,771 INFO L87 Difference]: Start difference. First operand 6299 states and 9739 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 11:22:34,733 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:20,869 INFO L93 Difference]: Finished difference Result 12568 states and 19471 transitions. [2022-12-14 11:23:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 11:23:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2022-12-14 11:23:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:20,888 INFO L225 Difference]: With dead ends: 12568 [2022-12-14 11:23:20,888 INFO L226 Difference]: Without dead ends: 6367 [2022-12-14 11:23:20,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 120.4s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:23:20,903 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 148 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 11220 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 5750 SdHoareTripleChecker+Invalid, 11250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:20,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 5750 Invalid, 11250 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 11220 Invalid, 0 Unknown, 0 Unchecked, 48.2s Time] [2022-12-14 11:23:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2022-12-14 11:23:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6300. [2022-12-14 11:23:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 4340 states have (on average 1.4596774193548387) internal successors, (6335), 4568 states have internal predecessors, (6335), 1480 states have call successors, (1480), 461 states have call predecessors, (1480), 479 states have return successors, (1913), 1376 states have call predecessors, (1913), 1469 states have call successors, (1913) [2022-12-14 11:23:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9728 transitions. [2022-12-14 11:23:21,264 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9728 transitions. Word has length 112 [2022-12-14 11:23:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:21,265 INFO L495 AbstractCegarLoop]: Abstraction has 6300 states and 9728 transitions. [2022-12-14 11:23:21,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 11:23:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9728 transitions. [2022-12-14 11:23:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 11:23:21,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:21,272 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:21,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:23:21,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:21,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1422777320, now seen corresponding path program 1 times [2022-12-14 11:23:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:21,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346943467] [2022-12-14 11:23:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 11:23:21,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:21,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346943467] [2022-12-14 11:23:21,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346943467] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:21,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417845498] [2022-12-14 11:23:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:21,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:21,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:23:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:23:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-14 11:23:22,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:23:22,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417845498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:22,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:23:22,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2022-12-14 11:23:22,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481606207] [2022-12-14 11:23:22,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:22,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:23:22,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:22,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:23:22,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:23:22,166 INFO L87 Difference]: Start difference. First operand 6300 states and 9728 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-12-14 11:23:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:25,338 INFO L93 Difference]: Finished difference Result 15939 states and 25319 transitions. [2022-12-14 11:23:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:23:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 182 [2022-12-14 11:23:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:25,367 INFO L225 Difference]: With dead ends: 15939 [2022-12-14 11:23:25,368 INFO L226 Difference]: Without dead ends: 9744 [2022-12-14 11:23:25,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:23:25,388 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 1689 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 6846 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 7677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:25,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 3138 Invalid, 7677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6846 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 11:23:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2022-12-14 11:23:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 8733. [2022-12-14 11:23:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 5998 states have (on average 1.444648216072024) internal successors, (8665), 6272 states have internal predecessors, (8665), 2032 states have call successors, (2032), 703 states have call predecessors, (2032), 702 states have return successors, (2712), 1897 states have call predecessors, (2712), 2013 states have call successors, (2712) [2022-12-14 11:23:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 13409 transitions. [2022-12-14 11:23:25,963 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 13409 transitions. Word has length 182 [2022-12-14 11:23:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:25,963 INFO L495 AbstractCegarLoop]: Abstraction has 8733 states and 13409 transitions. [2022-12-14 11:23:25,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-12-14 11:23:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 13409 transitions. [2022-12-14 11:23:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 11:23:25,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:25,970 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:25,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:23:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:23:26,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1770936599, now seen corresponding path program 1 times [2022-12-14 11:23:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:26,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850408430] [2022-12-14 11:23:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 11:23:26,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850408430] [2022-12-14 11:23:26,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850408430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322307977] [2022-12-14 11:23:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:26,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:26,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:23:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:26,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:23:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 11:23:26,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:23:26,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322307977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:26,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:23:26,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-12-14 11:23:26,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834742444] [2022-12-14 11:23:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:26,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:26,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:23:26,673 INFO L87 Difference]: Start difference. First operand 8733 states and 13409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 11:23:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:27,305 INFO L93 Difference]: Finished difference Result 15691 states and 24635 transitions. [2022-12-14 11:23:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 183 [2022-12-14 11:23:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:27,334 INFO L225 Difference]: With dead ends: 15691 [2022-12-14 11:23:27,335 INFO L226 Difference]: Without dead ends: 9064 [2022-12-14 11:23:27,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:23:27,357 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 33 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:27,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1256 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:23:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2022-12-14 11:23:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 8817. [2022-12-14 11:23:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 6070 states have (on average 1.4413509060955518) internal successors, (8749), 6344 states have internal predecessors, (8749), 2044 states have call successors, (2044), 703 states have call predecessors, (2044), 702 states have return successors, (2724), 1909 states have call predecessors, (2724), 2025 states have call successors, (2724) [2022-12-14 11:23:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 13517 transitions. [2022-12-14 11:23:27,893 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 13517 transitions. Word has length 183 [2022-12-14 11:23:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:27,893 INFO L495 AbstractCegarLoop]: Abstraction has 8817 states and 13517 transitions. [2022-12-14 11:23:27,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 11:23:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 13517 transitions. [2022-12-14 11:23:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 11:23:27,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:27,900 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:27,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:23:28,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:23:28,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1438693924, now seen corresponding path program 1 times [2022-12-14 11:23:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:28,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341472882] [2022-12-14 11:23:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 11:23:28,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:28,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341472882] [2022-12-14 11:23:28,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341472882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:28,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461117735] [2022-12-14 11:23:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:28,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:28,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:28,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:23:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:23:28,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 11:23:28,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:23:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 11:23:29,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461117735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:23:29,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749097518] [2022-12-14 11:23:29,176 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-12-14 11:23:29,176 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:23:29,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:23:29,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:23:29,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:23:35,364 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 11:23:44,097 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 73 for LOIs [2022-12-14 11:23:44,854 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 58 for LOIs [2022-12-14 11:23:45,273 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 61 for LOIs [2022-12-14 11:23:45,335 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 63 for LOIs [2022-12-14 11:23:45,349 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 11:23:45,351 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 36 for LOIs [2022-12-14 11:23:45,363 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 11:23:47,549 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 11:23:47,752 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2022-12-14 11:23:47,754 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 51 for LOIs [2022-12-14 11:23:47,822 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 45 for LOIs [2022-12-14 11:23:47,825 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 11:23:47,838 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 11:23:51,334 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 11:23:51,910 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 11:23:52,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:24:54,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249401#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:24:54,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:24:54,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:24:54,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-12-14 11:24:54,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479387791] [2022-12-14 11:24:54,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:24:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:24:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:24:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:24:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=11366, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 11:24:54,322 INFO L87 Difference]: Start difference. First operand 8817 states and 13517 transitions. Second operand has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2022-12-14 11:25:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:25:00,913 INFO L93 Difference]: Finished difference Result 32797 states and 54386 transitions. [2022-12-14 11:25:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:25:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) Word has length 186 [2022-12-14 11:25:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:25:00,988 INFO L225 Difference]: With dead ends: 32797 [2022-12-14 11:25:00,989 INFO L226 Difference]: Without dead ends: 24074 [2022-12-14 11:25:01,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 454 SyntacticMatches, 11 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6617 ImplicationChecksByTransitivity, 62.8s TimeCoverageRelationStatistics Valid=1078, Invalid=15178, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 11:25:01,030 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 5127 mSDsluCounter, 3372 mSDsCounter, 0 mSdLazyCounter, 9793 mSolverCounterSat, 3276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5243 SdHoareTripleChecker+Valid, 4104 SdHoareTripleChecker+Invalid, 13069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3276 IncrementalHoareTripleChecker+Valid, 9793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:25:01,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5243 Valid, 4104 Invalid, 13069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3276 Valid, 9793 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 11:25:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24074 states. [2022-12-14 11:25:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24074 to 20774. [2022-12-14 11:25:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20774 states, 14090 states have (on average 1.436053938963804) internal successors, (20234), 14941 states have internal predecessors, (20234), 5120 states have call successors, (5120), 1525 states have call predecessors, (5120), 1563 states have return successors, (7404), 4751 states have call predecessors, (7404), 5095 states have call successors, (7404) [2022-12-14 11:25:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20774 states to 20774 states and 32758 transitions. [2022-12-14 11:25:02,325 INFO L78 Accepts]: Start accepts. Automaton has 20774 states and 32758 transitions. Word has length 186 [2022-12-14 11:25:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:25:02,326 INFO L495 AbstractCegarLoop]: Abstraction has 20774 states and 32758 transitions. [2022-12-14 11:25:02,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2022-12-14 11:25:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20774 states and 32758 transitions. [2022-12-14 11:25:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-12-14 11:25:02,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:25:02,336 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:25:02,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:25:02,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:25:02,538 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:25:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:25:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1168306093, now seen corresponding path program 1 times [2022-12-14 11:25:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:25:02,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916284340] [2022-12-14 11:25:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:25:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 11:25:02,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:25:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916284340] [2022-12-14 11:25:02,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916284340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:25:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59187693] [2022-12-14 11:25:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:02,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:25:02,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:25:02,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:25:02,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:25:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:25:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:25:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 11:25:03,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:25:03,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59187693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:25:03,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:25:03,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2022-12-14 11:25:03,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077853626] [2022-12-14 11:25:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:25:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:25:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:25:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:25:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:25:03,218 INFO L87 Difference]: Start difference. First operand 20774 states and 32758 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 11:25:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:25:04,966 INFO L93 Difference]: Finished difference Result 42913 states and 68746 transitions. [2022-12-14 11:25:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:25:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 193 [2022-12-14 11:25:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:25:05,043 INFO L225 Difference]: With dead ends: 42913 [2022-12-14 11:25:05,043 INFO L226 Difference]: Without dead ends: 24233 [2022-12-14 11:25:05,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:25:05,103 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 119 mSDsluCounter, 3644 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 4416 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:25:05,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 4416 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:25:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2022-12-14 11:25:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 21086. [2022-12-14 11:25:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21086 states, 14344 states have (on average 1.4283324037925265) internal successors, (20488), 15207 states have internal predecessors, (20488), 5120 states have call successors, (5120), 1525 states have call predecessors, (5120), 1621 states have return successors, (7484), 4797 states have call predecessors, (7484), 5095 states have call successors, (7484) [2022-12-14 11:25:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21086 states to 21086 states and 33092 transitions. [2022-12-14 11:25:06,451 INFO L78 Accepts]: Start accepts. Automaton has 21086 states and 33092 transitions. Word has length 193 [2022-12-14 11:25:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:25:06,451 INFO L495 AbstractCegarLoop]: Abstraction has 21086 states and 33092 transitions. [2022-12-14 11:25:06,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 11:25:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 21086 states and 33092 transitions. [2022-12-14 11:25:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 11:25:06,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:25:06,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:25:06,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:25:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:25:06,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:25:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:25:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 705280515, now seen corresponding path program 1 times [2022-12-14 11:25:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:25:06,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326663057] [2022-12-14 11:25:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:06,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:25:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 11:25:06,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:25:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326663057] [2022-12-14 11:25:06,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326663057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:25:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280245234] [2022-12-14 11:25:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:06,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:25:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:25:06,969 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:25:06,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:25:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:25:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:25:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 11:25:07,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:25:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 11:25:07,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280245234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:25:07,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555823895] [2022-12-14 11:25:07,847 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2022-12-14 11:25:07,847 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:25:07,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:25:07,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:25:07,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:25:13,695 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 11:25:20,879 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 191 for LOIs [2022-12-14 11:25:22,273 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 58 for LOIs [2022-12-14 11:25:22,699 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-12-14 11:25:22,760 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 65 for LOIs [2022-12-14 11:25:22,774 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 11:25:22,776 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 11:25:24,939 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 11:25:25,146 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 73 for LOIs [2022-12-14 11:25:25,303 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 67 for LOIs [2022-12-14 11:25:25,309 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 11:25:25,316 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 46 for LOIs [2022-12-14 11:25:25,421 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 80 for LOIs [2022-12-14 11:25:25,432 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 97 for LOIs [2022-12-14 11:25:25,453 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 11:25:29,024 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 11:25:29,626 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 11:25:29,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:39,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '418752#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:39,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:39,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:26:39,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 12 [2022-12-14 11:26:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182856986] [2022-12-14 11:26:39,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:39,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:26:39,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:26:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=11248, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 11:26:39,454 INFO L87 Difference]: Start difference. First operand 21086 states and 33092 transitions. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 11 states have call successors, (71), 7 states have call predecessors, (71), 8 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2022-12-14 11:26:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:43,230 INFO L93 Difference]: Finished difference Result 44414 states and 71143 transitions. [2022-12-14 11:26:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:26:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 11 states have call successors, (71), 7 states have call predecessors, (71), 8 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) Word has length 196 [2022-12-14 11:26:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:43,330 INFO L225 Difference]: With dead ends: 44414 [2022-12-14 11:26:43,331 INFO L226 Difference]: Without dead ends: 25494 [2022-12-14 11:26:43,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 479 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5841 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=795, Invalid=12545, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 11:26:43,403 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 2104 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 1317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 4624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1317 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:43,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2118 Valid, 2258 Invalid, 4624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1317 Valid, 3307 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 11:26:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25494 states. [2022-12-14 11:26:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25494 to 24161. [2022-12-14 11:26:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24161 states, 15889 states have (on average 1.433633331235446) internal successors, (22779), 17245 states have internal predecessors, (22779), 6634 states have call successors, (6634), 1497 states have call predecessors, (6634), 1637 states have return successors, (9039), 6078 states have call predecessors, (9039), 6611 states have call successors, (9039) [2022-12-14 11:26:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24161 states to 24161 states and 38452 transitions. [2022-12-14 11:26:45,055 INFO L78 Accepts]: Start accepts. Automaton has 24161 states and 38452 transitions. Word has length 196 [2022-12-14 11:26:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:45,056 INFO L495 AbstractCegarLoop]: Abstraction has 24161 states and 38452 transitions. [2022-12-14 11:26:45,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 11 states have call successors, (71), 7 states have call predecessors, (71), 8 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2022-12-14 11:26:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 24161 states and 38452 transitions. [2022-12-14 11:26:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 11:26:45,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:45,065 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:26:45,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 11:26:45,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:26:45,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1616496217, now seen corresponding path program 1 times [2022-12-14 11:26:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:45,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130829634] [2022-12-14 11:26:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:45,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 11:26:45,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130829634] [2022-12-14 11:26:45,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130829634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443185141] [2022-12-14 11:26:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:45,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:45,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0db76629-7850-4a23-8ee3-b35b5913a97c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:26:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:46,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:26:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 91 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:26:46,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 11:26:46,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443185141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:46,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742349557] [2022-12-14 11:26:46,638 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 11:26:46,639 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:46,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:46,639 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:46,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:52,669 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 11:27:01,058 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 73 for LOIs [2022-12-14 11:27:01,655 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 56 for LOIs [2022-12-14 11:27:02,047 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 41 for LOIs [2022-12-14 11:27:02,073 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 43 for LOIs [2022-12-14 11:27:02,081 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 11:27:02,083 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 11:27:04,274 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 11:27:04,474 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 51 for LOIs [2022-12-14 11:27:04,552 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 45 for LOIs [2022-12-14 11:27:04,554 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 11:27:04,561 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 41 for LOIs [2022-12-14 11:27:04,650 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 76 for LOIs [2022-12-14 11:27:04,659 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 92 for LOIs [2022-12-14 11:27:04,679 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 11:27:08,227 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 11:27:08,855 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 11:27:09,003 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:28:12,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '517908#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:28:12,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:28:12,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:28:12,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 24 [2022-12-14 11:28:12,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164641358] [2022-12-14 11:28:12,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:28:12,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:28:12,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:28:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:28:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=13813, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 11:28:12,928 INFO L87 Difference]: Start difference. First operand 24161 states and 38452 transitions. Second operand has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78)