./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta --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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- 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-dbf71c6-m [2022-10-17 17:41:42,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:42,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:42,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:42,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:42,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:42,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:42,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:42,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:42,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:42,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:42,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:42,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:42,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:42,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:42,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:42,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:42,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:42,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:42,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:42,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:42,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:42,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:42,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:42,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:42,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:42,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:42,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:42,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:42,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:42,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:42,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:42,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:42,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:42,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:42,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:42,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:42,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:42,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:42,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:42,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:42,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:41:42,519 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:42,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:42,520 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:42,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:42,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:42,521 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:42,522 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:42,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:42,522 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:42,522 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:42,523 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:42,524 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:42,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:42,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:42,524 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:42,525 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:42,525 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:42,525 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:42,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:42,526 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:42,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:42,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:42,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:42,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:42,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:42,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:42,528 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:42,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:42,528 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:42,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:42,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:42,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:42,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:42,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:42,530 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:42,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:42,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:42,531 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:42,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:42,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:42,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:42,531 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_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2022-10-17 17:41:42,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:42,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:42,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:42,889 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:42,890 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:42,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2022-10-17 17:41:42,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/data/b069be39c/089aa4b4793c490cba62fb271fa8584e/FLAGe285b9364 [2022-10-17 17:41:43,660 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:43,661 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2022-10-17 17:41:43,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/data/b069be39c/089aa4b4793c490cba62fb271fa8584e/FLAGe285b9364 [2022-10-17 17:41:43,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/data/b069be39c/089aa4b4793c490cba62fb271fa8584e [2022-10-17 17:41:43,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:43,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:43,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:43,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:43,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:43,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:43" (1/1) ... [2022-10-17 17:41:43,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b33b110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:43, skipping insertion in model container [2022-10-17 17:41:43,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:43" (1/1) ... [2022-10-17 17:41:43,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:43,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:44,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2022-10-17 17:41:44,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:44,752 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:44,789 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2022-10-17 17:41:44,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:44,924 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:44,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44 WrapperNode [2022-10-17 17:41:44,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:44,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:44,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:44,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:44,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:44,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,052 INFO L138 Inliner]: procedures = 93, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 894 [2022-10-17 17:41:45,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:45,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:45,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:45,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:45,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:45,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:45,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:45,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:45,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:45,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:45,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:45,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_082f8760-7b9e-4732-86d9-bfc2ab9dc799/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:45,379 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-10-17 17:41:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-10-17 17:41:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 17:41:45,380 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 17:41:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-10-17 17:41:45,380 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-10-17 17:41:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 17:41:45,381 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 17:41:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 17:41:45,381 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 17:41:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 17:41:45,382 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 17:41:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:41:45,382 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:41:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:41:45,383 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:41:45,383 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:41:45,383 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:41:45,383 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-10-17 17:41:45,383 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-10-17 17:41:45,384 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 17:41:45,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 17:41:45,384 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 17:41:45,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 17:41:45,384 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 17:41:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 17:41:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 17:41:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 17:41:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-10-17 17:41:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-10-17 17:41:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 17:41:45,386 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 17:41:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 17:41:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 17:41:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 17:41:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 17:41:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 17:41:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 17:41:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 17:41:45,388 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 17:41:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-10-17 17:41:45,389 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-10-17 17:41:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 17:41:45,390 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 17:41:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 17:41:45,392 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 17:41:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 17:41:45,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 17:41:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:45,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:45,394 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 17:41:45,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 17:41:45,607 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:45,611 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:47,341 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:48,571 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:48,571 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:41:48,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:48 BoogieIcfgContainer [2022-10-17 17:41:48,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:48,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:48,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:48,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:48,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:43" (1/3) ... [2022-10-17 17:41:48,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e9b4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:48, skipping insertion in model container [2022-10-17 17:41:48,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (2/3) ... [2022-10-17 17:41:48,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e9b4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:48, skipping insertion in model container [2022-10-17 17:41:48,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:48" (3/3) ... [2022-10-17 17:41:48,590 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2022-10-17 17:41:48,616 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:48,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:41:48,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:48,711 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;@184b0e7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:48,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:41:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-10-17 17:41:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 17:41:48,760 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:48,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:48,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1730455560, now seen corresponding path program 1 times [2022-10-17 17:41:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:48,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270179987] [2022-10-17 17:41:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:41:50,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:50,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270179987] [2022-10-17 17:41:50,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270179987] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:50,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:50,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:41:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813966535] [2022-10-17 17:41:50,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:50,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:41:50,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:50,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:41:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:41:50,297 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:41:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:51,031 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2022-10-17 17:41:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:41:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-10-17 17:41:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:51,057 INFO L225 Difference]: With dead ends: 851 [2022-10-17 17:41:51,057 INFO L226 Difference]: Without dead ends: 490 [2022-10-17 17:41:51,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:51,072 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 282 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:51,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2351 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:41:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-10-17 17:41:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2022-10-17 17:41:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-10-17 17:41:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2022-10-17 17:41:51,224 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2022-10-17 17:41:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:51,226 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2022-10-17 17:41:51,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:41:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2022-10-17 17:41:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-10-17 17:41:51,245 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:51,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:51,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:41:51,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1940037977, now seen corresponding path program 1 times [2022-10-17 17:41:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382921549] [2022-10-17 17:41:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:41:51,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382921549] [2022-10-17 17:41:51,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382921549] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:51,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:51,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:41:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430540657] [2022-10-17 17:41:51,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:51,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:41:51,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:41:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:41:51,931 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-10-17 17:41:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:55,766 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2022-10-17 17:41:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 17:41:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2022-10-17 17:41:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:55,780 INFO L225 Difference]: With dead ends: 1287 [2022-10-17 17:41:55,780 INFO L226 Difference]: Without dead ends: 930 [2022-10-17 17:41:55,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-10-17 17:41:55,789 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 1736 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 3591 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 4188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 3591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:55,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1802 Valid, 2913 Invalid, 4188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [597 Valid, 3591 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-10-17 17:41:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-10-17 17:41:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2022-10-17 17:41:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2022-10-17 17:41:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2022-10-17 17:41:55,904 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2022-10-17 17:41:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:55,906 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2022-10-17 17:41:55,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-10-17 17:41:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2022-10-17 17:41:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 17:41:55,912 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:55,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:55,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:41:55,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1999918314, now seen corresponding path program 1 times [2022-10-17 17:41:55,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:55,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538933208] [2022-10-17 17:41:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:55,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:41:56,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:56,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538933208] [2022-10-17 17:41:56,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538933208] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:56,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:41:56,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058089500] [2022-10-17 17:41:56,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:56,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:41:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:56,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:41:56,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:56,447 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:41:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:56,761 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2022-10-17 17:41:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:41:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-10-17 17:41:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:56,776 INFO L225 Difference]: With dead ends: 1477 [2022-10-17 17:41:56,776 INFO L226 Difference]: Without dead ends: 963 [2022-10-17 17:41:56,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:56,789 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:56,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3533 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:41:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-10-17 17:41:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2022-10-17 17:41:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2022-10-17 17:41:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2022-10-17 17:41:56,872 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2022-10-17 17:41:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:56,874 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2022-10-17 17:41:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:41:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2022-10-17 17:41:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-10-17 17:41:56,879 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:56,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:41:56,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337395, now seen corresponding path program 1 times [2022-10-17 17:41:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:56,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709622906] [2022-10-17 17:41:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:41:57,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709622906] [2022-10-17 17:41:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709622906] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:57,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:57,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:41:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136219524] [2022-10-17 17:41:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:57,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:41:57,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:41:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:57,378 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:41:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:57,715 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2022-10-17 17:41:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:41:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-10-17 17:41:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:57,731 INFO L225 Difference]: With dead ends: 1506 [2022-10-17 17:41:57,732 INFO L226 Difference]: Without dead ends: 978 [2022-10-17 17:41:57,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:57,745 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 41 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:57,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3557 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:41:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-10-17 17:41:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2022-10-17 17:41:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2022-10-17 17:41:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2022-10-17 17:41:57,850 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 84 [2022-10-17 17:41:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:57,851 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2022-10-17 17:41:57,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:41:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2022-10-17 17:41:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-10-17 17:41:57,855 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:57,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:57,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:41:57,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -56688493, now seen corresponding path program 1 times [2022-10-17 17:41:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:57,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376198008] [2022-10-17 17:41:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:41:59,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:59,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376198008] [2022-10-17 17:41:59,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376198008] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:59,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:59,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:41:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180522694] [2022-10-17 17:41:59,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:59,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:41:59,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:41:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:59,807 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-10-17 17:42:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:04,899 INFO L93 Difference]: Finished difference Result 3877 states and 6311 transitions. [2022-10-17 17:42:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:42:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2022-10-17 17:42:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:04,949 INFO L225 Difference]: With dead ends: 3877 [2022-10-17 17:42:04,950 INFO L226 Difference]: Without dead ends: 3003 [2022-10-17 17:42:04,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:42:04,959 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 2198 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 3033 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:04,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2305 Valid, 2433 Invalid, 4007 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [974 Valid, 3033 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-10-17 17:42:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-10-17 17:42:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2731. [2022-10-17 17:42:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 1919 states have (on average 1.5742574257425743) internal successors, (3021), 2023 states have internal predecessors, (3021), 648 states have call successors, (648), 129 states have call predecessors, (648), 163 states have return successors, (738), 649 states have call predecessors, (738), 643 states have call successors, (738) [2022-10-17 17:42:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4407 transitions. [2022-10-17 17:42:05,411 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4407 transitions. Word has length 84 [2022-10-17 17:42:05,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:05,411 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 4407 transitions. [2022-10-17 17:42:05,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-10-17 17:42:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4407 transitions. [2022-10-17 17:42:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-10-17 17:42:05,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:05,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:42:05,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash -866911837, now seen corresponding path program 1 times [2022-10-17 17:42:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:05,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735581054] [2022-10-17 17:42:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:42:05,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:05,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735581054] [2022-10-17 17:42:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735581054] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:05,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:05,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:42:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696123252] [2022-10-17 17:42:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:42:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:42:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:42:05,944 INFO L87 Difference]: Start difference. First operand 2731 states and 4407 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-17 17:42:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:08,991 INFO L93 Difference]: Finished difference Result 6167 states and 10005 transitions. [2022-10-17 17:42:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:42:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 90 [2022-10-17 17:42:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:09,036 INFO L225 Difference]: With dead ends: 6167 [2022-10-17 17:42:09,036 INFO L226 Difference]: Without dead ends: 4156 [2022-10-17 17:42:09,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:42:09,055 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 2908 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 3260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:09,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3073 Valid, 1527 Invalid, 3260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-10-17 17:42:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states.