./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7 --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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:24:14,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:24:14,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:24:14,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:24:14,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:24:14,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:24:14,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:24:14,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:24:14,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:24:14,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:24:14,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:24:14,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:24:14,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:24:14,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:24:14,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:24:14,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:24:14,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:24:14,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:24:14,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:24:14,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:24:14,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:24:14,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:24:14,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:24:14,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:24:14,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:24:14,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:24:14,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:24:14,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:24:14,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:24:14,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:24:14,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:24:14,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:24:14,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:24:14,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:24:14,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:24:14,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:24:14,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:24:14,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:24:14,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:24:14,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:24:14,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:24:14,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:24:14,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:24:14,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:24:14,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:24:14,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:24:14,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:24:14,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:24:14,337 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:24:14,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:24:14,337 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:24:14,337 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:24:14,338 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:24:14,339 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:24:14,339 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:24:14,339 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:24:14,339 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:24:14,339 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:24:14,340 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:24:14,340 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:24:14,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:24:14,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:24:14,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:24:14,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:24:14,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:24:14,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:24:14,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:24:14,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:24:14,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:24:14,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:24:14,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:24:14,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:24:14,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:24:14,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:24:14,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:24:14,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:24:14,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:24:14,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:24:14,345 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:24:14,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:24:14,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:24:14,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:24:14,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:24:14,346 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-11-25 18:24:14,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:24:14,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:24:14,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:24:14,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:24:14,663 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:24:14,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-25 18:24:14,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/data/40cdc7d72/baac4e75e0e3433db4874ffa693de233/FLAGb4b47f46c [2021-11-25 18:24:15,343 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:24:15,344 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-25 18:24:15,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/data/40cdc7d72/baac4e75e0e3433db4874ffa693de233/FLAGb4b47f46c [2021-11-25 18:24:15,552 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/data/40cdc7d72/baac4e75e0e3433db4874ffa693de233 [2021-11-25 18:24:15,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:24:15,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:24:15,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:24:15,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:24:15,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:24:15,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:24:15" (1/1) ... [2021-11-25 18:24:15,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cce344c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:15, skipping insertion in model container [2021-11-25 18:24:15,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:24:15" (1/1) ... [2021-11-25 18:24:15,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:24:15,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:24:16,098 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_5800f31f-b47e-482c-b447-db4518593e5f/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-25 18:24:16,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:24:16,216 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:24:16,348 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_5800f31f-b47e-482c-b447-db4518593e5f/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-25 18:24:16,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:24:16,422 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:24:16,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16 WrapperNode [2021-11-25 18:24:16,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:24:16,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:24:16,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:24:16,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:24:16,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,557 INFO L137 Inliner]: procedures = 91, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 862 [2021-11-25 18:24:16,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:24:16,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:24:16,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:24:16,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:24:16,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:24:16,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:24:16,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:24:16,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:24:16,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (1/1) ... [2021-11-25 18:24:16,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:24:16,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:16,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:24:16,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:24:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 18:24:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 18:24:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:24:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 18:24:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 18:24:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 18:24:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 18:24:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-25 18:24:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-25 18:24:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 18:24:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 18:24:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 18:24:16,723 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 18:24:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 18:24:16,723 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 18:24:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 18:24:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 18:24:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 18:24:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 18:24:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 18:24:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 18:24:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 18:24:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 18:24:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 18:24:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 18:24:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 18:24:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 18:24:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 18:24:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 18:24:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 18:24:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 18:24:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 18:24:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 18:24:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 18:24:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 18:24:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 18:24:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 18:24:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 18:24:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 18:24:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 18:24:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 18:24:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:24:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 18:24:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 18:24:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 18:24:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 18:24:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 18:24:16,731 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 18:24:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 18:24:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 18:24:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:24:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:24:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 18:24:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 18:24:16,949 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:24:16,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:24:18,170 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:24:18,763 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:24:18,763 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:24:18,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:24:18 BoogieIcfgContainer [2021-11-25 18:24:18,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:24:18,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:24:18,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:24:18,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:24:18,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:24:15" (1/3) ... [2021-11-25 18:24:18,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9d39fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:24:18, skipping insertion in model container [2021-11-25 18:24:18,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:16" (2/3) ... [2021-11-25 18:24:18,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9d39fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:24:18, skipping insertion in model container [2021-11-25 18:24:18,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:24:18" (3/3) ... [2021-11-25 18:24:18,777 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2021-11-25 18:24:18,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:24:18,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:24:18,854 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:24:18,864 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:24:18,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:24:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-25 18:24:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 18:24:18,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:18,943 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:18,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1819455823, now seen corresponding path program 1 times [2021-11-25 18:24:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918650298] [2021-11-25 18:24:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:18,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:19,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:19,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918650298] [2021-11-25 18:24:19,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918650298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:19,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:19,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:24:19,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110806491] [2021-11-25 18:24:19,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:19,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:24:19,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:24:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:24:19,673 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 18:24:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:20,340 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2021-11-25 18:24:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:24:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-11-25 18:24:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:20,377 INFO L225 Difference]: With dead ends: 1204 [2021-11-25 18:24:20,377 INFO L226 Difference]: Without dead ends: 800 [2021-11-25 18:24:20,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:24:20,394 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3841 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 4458 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:20,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 4458 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:24:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-25 18:24:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2021-11-25 18:24:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2021-11-25 18:24:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2021-11-25 18:24:20,584 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2021-11-25 18:24:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:20,585 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2021-11-25 18:24:20,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 18:24:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2021-11-25 18:24:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 18:24:20,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:20,594 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:20,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:24:20,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash 307058614, now seen corresponding path program 1 times [2021-11-25 18:24:20,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:20,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270177388] [2021-11-25 18:24:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:20,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:20,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270177388] [2021-11-25 18:24:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270177388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:20,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:20,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:24:20,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652533364] [2021-11-25 18:24:20,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:20,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:24:20,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:24:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:24:20,779 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:24:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:21,016 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2021-11-25 18:24:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:24:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2021-11-25 18:24:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:21,025 INFO L225 Difference]: With dead ends: 1219 [2021-11-25 18:24:21,026 INFO L226 Difference]: Without dead ends: 829 [2021-11-25 18:24:21,029 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:24:21,031 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 32 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3786 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:21,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3786 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:24:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-25 18:24:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2021-11-25 18:24:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2021-11-25 18:24:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2021-11-25 18:24:21,101 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 86 [2021-11-25 18:24:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:21,102 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2021-11-25 18:24:21,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:24:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2021-11-25 18:24:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 18:24:21,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:21,108 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:21,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:24:21,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:21,109 INFO L85 PathProgramCache]: Analyzing trace with hash -763691551, now seen corresponding path program 1 times [2021-11-25 18:24:21,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097416979] [2021-11-25 18:24:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:21,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:21,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:21,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097416979] [2021-11-25 18:24:21,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097416979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:21,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:21,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:24:21,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974774298] [2021-11-25 18:24:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:21,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:24:21,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:24:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:24:21,340 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-25 18:24:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:22,710 INFO L93 Difference]: Finished difference Result 3105 states and 5034 transitions. [2021-11-25 18:24:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:24:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-11-25 18:24:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:22,733 INFO L225 Difference]: With dead ends: 3105 [2021-11-25 18:24:22,733 INFO L226 Difference]: Without dead ends: 2322 [2021-11-25 18:24:22,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:24:22,749 INFO L933 BasicCegarLoop]: 1246 mSDtfsCounter, 1174 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 3103 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:22,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 3103 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:24:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-11-25 18:24:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2010. [2021-11-25 18:24:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1459 states have (on average 1.5496915695681974) internal successors, (2261), 1511 states have internal predecessors, (2261), 422 states have call successors, (422), 117 states have call predecessors, (422), 128 states have return successors, (518), 419 states have call predecessors, (518), 414 states have call successors, (518) [2021-11-25 18:24:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3201 transitions. [2021-11-25 18:24:22,972 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3201 transitions. Word has length 87 [2021-11-25 18:24:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:22,973 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 3201 transitions. [2021-11-25 18:24:22,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-25 18:24:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3201 transitions. [2021-11-25 18:24:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 18:24:22,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:22,977 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:22,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:24:22,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash -89730047, now seen corresponding path program 1 times [2021-11-25 18:24:22,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:22,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823267319] [2021-11-25 18:24:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:22,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:23,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:23,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823267319] [2021-11-25 18:24:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823267319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:23,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:23,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:24:23,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174568265] [2021-11-25 18:24:23,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:24:23,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:24:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:24:23,105 INFO L87 Difference]: Start difference. First operand 2010 states and 3201 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), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:24:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:23,414 INFO L93 Difference]: Finished difference Result 3142 states and 5038 transitions. [2021-11-25 18:24:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:24:23,415 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), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2021-11-25 18:24:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:23,442 INFO L225 Difference]: With dead ends: 3142 [2021-11-25 18:24:23,443 INFO L226 Difference]: Without dead ends: 2129 [2021-11-25 18:24:23,452 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:24:23,460 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3337 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:23,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3800 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:24:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-11-25 18:24:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2069. [2021-11-25 18:24:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1502 states have (on average 1.5459387483355527) internal successors, (2322), 1549 states have internal predecessors, (2322), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 440 states have call predecessors, (559), 426 states have call successors, (559) [2021-11-25 18:24:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3315 transitions. [2021-11-25 18:24:23,670 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3315 transitions. Word has length 87 [2021-11-25 18:24:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:23,671 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 3315 transitions. [2021-11-25 18:24:23,671 INFO L471 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), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:24:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3315 transitions. [2021-11-25 18:24:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 18:24:23,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:23,681 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:23,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:24:23,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1303691788, now seen corresponding path program 1 times [2021-11-25 18:24:23,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:23,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838899413] [2021-11-25 18:24:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:23,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:23,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838899413] [2021-11-25 18:24:23,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838899413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:23,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:23,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:24:23,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142317505] [2021-11-25 18:24:23,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:23,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:24:23,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:24:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:24:23,896 INFO L87 Difference]: Start difference. First operand 2069 states and 3315 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 18:24:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:24,933 INFO L93 Difference]: Finished difference Result 4534 states and 7324 transitions. [2021-11-25 18:24:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:24:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2021-11-25 18:24:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:24,962 INFO L225 Difference]: With dead ends: 4534 [2021-11-25 18:24:24,962 INFO L226 Difference]: Without dead ends: 3111 [2021-11-25 18:24:24,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:24:24,983 INFO L933 BasicCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:24,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:24:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-11-25 18:24:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2021-11-25 18:24:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2021-11-25 18:24:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2021-11-25 18:24:25,207 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 93 [2021-11-25 18:24:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:25,208 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2021-11-25 18:24:25,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 18:24:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2021-11-25 18:24:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 18:24:25,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:25,213 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:24:25,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1878026199, now seen corresponding path program 1 times [2021-11-25 18:24:25,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:25,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231988693] [2021-11-25 18:24:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:25,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:25,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:25,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231988693] [2021-11-25 18:24:25,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231988693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:25,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:25,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:24:25,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839072559] [2021-11-25 18:24:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:25,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:24:25,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:24:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:24:25,416 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:24:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:26,025 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2021-11-25 18:24:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:24:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2021-11-25 18:24:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:26,055 INFO L225 Difference]: With dead ends: 5309 [2021-11-25 18:24:26,055 INFO L226 Difference]: Without dead ends: 3111 [2021-11-25 18:24:26,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:24:26,077 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:26,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:24:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-11-25 18:24:26,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2021-11-25 18:24:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2021-11-25 18:24:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2021-11-25 18:24:26,325 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 95 [2021-11-25 18:24:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:26,326 INFO L470 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2021-11-25 18:24:26,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:24:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2021-11-25 18:24:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 18:24:26,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:26,330 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:26,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:24:26,331 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -411671538, now seen corresponding path program 1 times [2021-11-25 18:24:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874735693] [2021-11-25 18:24:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:26,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:24:26,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874735693] [2021-11-25 18:24:26,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874735693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506883046] [2021-11-25 18:24:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:26,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:26,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:26,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:24:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:24:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:24:27,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:24:27,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506883046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:27,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:24:27,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-25 18:24:27,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347949191] [2021-11-25 18:24:27,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:27,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:24:27,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:24:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:24:27,040 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:27,379 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2021-11-25 18:24:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:24:27,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2021-11-25 18:24:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:27,407 INFO L225 Difference]: With dead ends: 6211 [2021-11-25 18:24:27,407 INFO L226 Difference]: Without dead ends: 3140 [2021-11-25 18:24:27,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:24:27,444 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:27,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:24:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-11-25 18:24:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2021-11-25 18:24:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2021-11-25 18:24:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2021-11-25 18:24:27,668 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2021-11-25 18:24:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:27,669 INFO L470 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2021-11-25 18:24:27,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2021-11-25 18:24:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 18:24:27,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:27,674 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:27,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:24:27,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:24:27,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -52146884, now seen corresponding path program 1 times [2021-11-25 18:24:27,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:27,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263862264] [2021-11-25 18:24:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:27,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:28,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:28,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263862264] [2021-11-25 18:24:28,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263862264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:28,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020816861] [2021-11-25 18:24:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:28,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:28,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:28,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:24:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:24:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:24:28,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:24:28,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020816861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:28,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:24:28,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 18:24:28,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154768686] [2021-11-25 18:24:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:28,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:24:28,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:24:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:24:28,504 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:28,793 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2021-11-25 18:24:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:24:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2021-11-25 18:24:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:28,821 INFO L225 Difference]: With dead ends: 6292 [2021-11-25 18:24:28,821 INFO L226 Difference]: Without dead ends: 3131 [2021-11-25 18:24:28,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:24:28,847 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:28,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:24:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-25 18:24:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2021-11-25 18:24:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2021-11-25 18:24:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2021-11-25 18:24:29,062 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 102 [2021-11-25 18:24:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:29,064 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2021-11-25 18:24:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2021-11-25 18:24:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 18:24:29,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:29,071 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:29,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:29,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:29,281 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1292378790, now seen corresponding path program 1 times [2021-11-25 18:24:29,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:29,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120512990] [2021-11-25 18:24:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:29,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:24:29,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:29,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120512990] [2021-11-25 18:24:29,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120512990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:29,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9724513] [2021-11-25 18:24:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:29,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:29,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:24:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:24:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:24:29,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:24:29,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9724513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:29,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:24:29,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 18:24:29,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872702585] [2021-11-25 18:24:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:29,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:24:29,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:24:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:24:29,904 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2021-11-25 18:24:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:30,985 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2021-11-25 18:24:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:24:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 103 [2021-11-25 18:24:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:31,047 INFO L225 Difference]: With dead ends: 8109 [2021-11-25 18:24:31,048 INFO L226 Difference]: Without dead ends: 4993 [2021-11-25 18:24:31,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:24:31,073 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 619 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:31,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 2002 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:24:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-11-25 18:24:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2021-11-25 18:24:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2021-11-25 18:24:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2021-11-25 18:24:31,410 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 103 [2021-11-25 18:24:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2021-11-25 18:24:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2021-11-25 18:24:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2021-11-25 18:24:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 18:24:31,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:31,416 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:31,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:31,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:24:31,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:31,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1095052512, now seen corresponding path program 1 times [2021-11-25 18:24:31,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:31,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936362816] [2021-11-25 18:24:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:31,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:24:31,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:31,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936362816] [2021-11-25 18:24:31,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936362816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:31,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196479438] [2021-11-25 18:24:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:31,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:31,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:31,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:31,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:24:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:24:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:24:32,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:24:32,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196479438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:32,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:24:32,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 18:24:32,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373282106] [2021-11-25 18:24:32,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:32,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:24:32,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:32,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:24:32,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:24:32,247 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:24:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:33,337 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2021-11-25 18:24:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:24:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2021-11-25 18:24:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:33,382 INFO L225 Difference]: With dead ends: 11020 [2021-11-25 18:24:33,382 INFO L226 Difference]: Without dead ends: 6104 [2021-11-25 18:24:33,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:24:33,413 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 700 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:33,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 3257 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:24:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2021-11-25 18:24:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2021-11-25 18:24:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2021-11-25 18:24:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2021-11-25 18:24:33,884 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 103 [2021-11-25 18:24:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2021-11-25 18:24:33,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:24:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2021-11-25 18:24:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 18:24:33,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:33,890 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:24:33,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:34,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:24:34,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2008991990, now seen corresponding path program 1 times [2021-11-25 18:24:34,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:34,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146794939] [2021-11-25 18:24:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:34,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:24:34,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146794939] [2021-11-25 18:24:34,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146794939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:34,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368100621] [2021-11-25 18:24:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:34,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:34,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:34,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:24:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:34,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:24:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:24:34,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:24:34,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368100621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:34,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:24:34,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-25 18:24:34,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710622468] [2021-11-25 18:24:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:34,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:24:34,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:34,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:24:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:24:34,640 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:35,141 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2021-11-25 18:24:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:24:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2021-11-25 18:24:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:35,183 INFO L225 Difference]: With dead ends: 11905 [2021-11-25 18:24:35,183 INFO L226 Difference]: Without dead ends: 5678 [2021-11-25 18:24:35,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:24:35,242 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 4 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:35,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1771 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:24:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2021-11-25 18:24:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2021-11-25 18:24:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2021-11-25 18:24:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2021-11-25 18:24:35,699 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 108 [2021-11-25 18:24:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:35,700 INFO L470 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2021-11-25 18:24:35,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2021-11-25 18:24:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 18:24:35,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:35,708 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-25 18:24:35,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:35,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:35,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:24:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash -447165813, now seen corresponding path program 1 times [2021-11-25 18:24:35,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:35,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531765304] [2021-11-25 18:24:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:35,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:24:36,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:36,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531765304] [2021-11-25 18:24:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531765304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292865824] [2021-11-25 18:24:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:36,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:36,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:36,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:36,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:24:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:24:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:24:36,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:24:36,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292865824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729008135] [2021-11-25 18:24:36,992 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2021-11-25 18:24:36,993 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:36,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:37,003 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:37,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:43,282 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-25 18:24:44,756 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-25 18:24:44,827 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-25 18:24:47,693 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2021-11-25 18:24:52,359 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-25 18:24:52,780 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:25:02,549 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:09,036 WARN L227 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:24,686 WARN L227 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:31,308 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 779 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:26:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [729008135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:00,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:00,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2021-11-25 18:26:00,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173714774] [2021-11-25 18:26:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:00,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:26:00,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:26:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:26:00,289 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 18:26:20,345 WARN L227 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 779 DAG size of output: 560 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:26:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:43,297 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2021-11-25 18:26:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:26:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 110 [2021-11-25 18:26:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:43,327 INFO L225 Difference]: With dead ends: 10981 [2021-11-25 18:26:43,328 INFO L226 Difference]: Without dead ends: 5525 [2021-11-25 18:26:43,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 90.7s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:26:43,364 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 39 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 4016 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 4779 SdHoareTripleChecker+Invalid, 4033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:43,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 4779 Invalid, 4033 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 4016 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2021-11-25 18:26:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-11-25 18:26:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2021-11-25 18:26:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2021-11-25 18:26:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2021-11-25 18:26:43,732 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 110 [2021-11-25 18:26:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:43,733 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2021-11-25 18:26:43,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 18:26:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2021-11-25 18:26:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 18:26:43,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:43,738 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-25 18:26:43,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:43,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:43,964 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash -462717573, now seen corresponding path program 1 times [2021-11-25 18:26:43,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:43,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517076549] [2021-11-25 18:26:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:43,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 18:26:44,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517076549] [2021-11-25 18:26:44,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517076549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:44,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:44,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:26:44,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350254149] [2021-11-25 18:26:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:44,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:26:44,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:26:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:26:44,081 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:26:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:44,645 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2021-11-25 18:26:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:26:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2021-11-25 18:26:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:44,686 INFO L225 Difference]: With dead ends: 11386 [2021-11-25 18:26:44,687 INFO L226 Difference]: Without dead ends: 6539 [2021-11-25 18:26:44,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:26:44,730 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 252 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:44,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2567 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:26:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-11-25 18:26:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2021-11-25 18:26:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2021-11-25 18:26:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2021-11-25 18:26:45,322 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 112 [2021-11-25 18:26:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:45,324 INFO L470 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2021-11-25 18:26:45,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:26:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2021-11-25 18:26:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:26:45,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:45,339 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:45,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:26:45,339 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1428077247, now seen corresponding path program 1 times [2021-11-25 18:26:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:45,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926386967] [2021-11-25 18:26:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:45,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:26:45,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926386967] [2021-11-25 18:26:45,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926386967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528143025] [2021-11-25 18:26:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:45,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:45,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:45,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:45,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:26:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:26:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:26:45,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:26:46,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528143025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:46,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293141269] [2021-11-25 18:26:46,309 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2021-11-25 18:26:46,311 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:46,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:46,313 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:46,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:50,446 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-25 18:27:36,872 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 509 for LOIs [2021-11-25 18:27:37,962 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 505 for LOIs [2021-11-25 18:27:38,080 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 465 for LOIs [2021-11-25 18:27:40,336 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 531 for LOIs [2021-11-25 18:27:40,648 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 105 for LOIs [2021-11-25 18:27:41,032 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 97 for LOIs [2021-11-25 18:27:41,049 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-25 18:27:41,122 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-25 18:27:43,482 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2021-11-25 18:27:47,351 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-25 18:27:47,754 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:27:57,470 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:04,567 WARN L227 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:21,185 WARN L227 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:28,502 WARN L227 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 779 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:10,804 WARN L227 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 531 DAG size of output: 445 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:22,135 WARN L227 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 570 DAG size of output: 460 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:32,591 WARN L227 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 683 DAG size of output: 610 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:42,681 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 688 DAG size of output: 623 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:52,872 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 683 DAG size of output: 619 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:11,446 WARN L227 SmtUtils]: Spent 9.18s on a formula simplification. DAG size of input: 694 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:21,593 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 703 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:31,745 WARN L227 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 712 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:42,072 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 717 DAG size of output: 606 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:53,254 WARN L227 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 713 DAG size of output: 638 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:52,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [293141269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:52,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:31:52,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [5, 6, 7] total 66 [2021-11-25 18:31:52,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532941339] [2021-11-25 18:31:52,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:52,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-25 18:31:52,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-25 18:31:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2021-11-25 18:31:52,191 INFO L87 Difference]: Start difference. First operand 6323 states and 10612 transitions. Second operand has 54 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 33 states have internal predecessors, (71), 16 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-25 18:32:16,944 WARN L227 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 779 DAG size of output: 560 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:32:44,599 WARN L227 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 680 DAG size of output: 639 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:32:51,461 WARN L227 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 684 DAG size of output: 630 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:33:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:33:30,388 INFO L93 Difference]: Finished difference Result 12714 states and 21342 transitions. [2021-11-25 18:33:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-25 18:33:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 33 states have internal predecessors, (71), 16 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 116 [2021-11-25 18:33:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:33:30,435 INFO L225 Difference]: With dead ends: 12714 [2021-11-25 18:33:30,435 INFO L226 Difference]: Without dead ends: 6431 [2021-11-25 18:33:30,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 277 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 286.3s TimeCoverageRelationStatistics Valid=409, Invalid=4847, Unknown=0, NotChecked=0, Total=5256 [2021-11-25 18:33:30,485 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 98 mSDsluCounter, 9261 mSDsCounter, 0 mSdLazyCounter, 13228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 9689 SdHoareTripleChecker+Invalid, 13266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 13228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:33:30,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 9689 Invalid, 13266 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [38 Valid, 13228 Invalid, 0 Unknown, 0 Unchecked, 55.5s Time] [2021-11-25 18:33:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6431 states. [2021-11-25 18:33:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6431 to 6393. [2021-11-25 18:33:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 4453 states have (on average 1.4271277790253762) internal successors, (6355), 4693 states have internal predecessors, (6355), 1463 states have call successors, (1463), 421 states have call predecessors, (1463), 476 states have return successors, (2870), 1443 states have call predecessors, (2870), 1438 states have call successors, (2870) [2021-11-25 18:33:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 10688 transitions. [2021-11-25 18:33:31,092 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 10688 transitions. Word has length 116 [2021-11-25 18:33:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:33:31,096 INFO L470 AbstractCegarLoop]: Abstraction has 6393 states and 10688 transitions. [2021-11-25 18:33:31,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 33 states have internal predecessors, (71), 16 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-25 18:33:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 10688 transitions. [2021-11-25 18:33:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 18:33:31,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:33:31,106 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:33:31,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:33:31,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:33:31,322 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:33:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:33:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2100132260, now seen corresponding path program 1 times [2021-11-25 18:33:31,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:33:31,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594164434] [2021-11-25 18:33:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:31,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:33:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:33:31,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594164434] [2021-11-25 18:33:31,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594164434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165188013] [2021-11-25 18:33:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:31,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:31,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:31,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800f31f-b47e-482c-b447-db4518593e5f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:33:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:33:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:33:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:33:32,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:33:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:33:32,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165188013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:33:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581508071] [2021-11-25 18:33:32,393 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-25 18:33:32,393 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:33:32,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:33:32,397 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:33:32,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:33:37,216 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-25 18:34:34,423 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 509 for LOIs [2021-11-25 18:34:35,818 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 505 for LOIs [2021-11-25 18:34:35,974 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 465 for LOIs [2021-11-25 18:34:40,356 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 61 for LOIs [2021-11-25 18:34:40,371 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 104 for LOIs [2021-11-25 18:34:40,740 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 100 for LOIs [2021-11-25 18:34:40,761 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-25 18:34:40,857 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-25 18:34:43,818 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2021-11-25 18:34:48,560 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-25 18:34:49,107 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:35:00,862 WARN L227 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:09,134 WARN L227 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:28,621 WARN L227 SmtUtils]: Spent 10.28s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:36,644 WARN L227 SmtUtils]: Spent 7.18s on a formula simplification that was a NOOP. DAG size: 779 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:07,396 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)