./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:31:48,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:31:48,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:31:48,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:31:48,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:31:48,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:31:48,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:31:48,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:31:48,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:31:48,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:31:48,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:31:48,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:31:48,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:31:48,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:31:48,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:31:48,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:31:48,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:31:48,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:31:48,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:31:48,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:31:48,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:31:48,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:31:48,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:31:48,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:31:48,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:31:48,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:31:48,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:31:48,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:31:48,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:31:48,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:31:48,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:31:48,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:31:48,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:31:48,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:31:48,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:31:48,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:31:48,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:31:48,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:31:48,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:31:48,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:31:48,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:31:48,439 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:31:48,457 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:31:48,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:31:48,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:31:48,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:31:48,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:31:48,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:31:48,459 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:31:48,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:31:48,459 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:31:48,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:31:48,459 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:31:48,459 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:31:48,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:31:48,460 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:31:48,460 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:31:48,460 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:31:48,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:31:48,460 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:31:48,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:31:48,461 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:31:48,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:31:48,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:31:48,462 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:31:48,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:31:48,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:31:48,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:31:48,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:31:48,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:31:48,463 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:31:48,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2022-12-14 06:31:48,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:31:48,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:31:48,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:31:48,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:31:48,651 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:31:48,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-12-14 06:31:51,228 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:31:51,456 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:31:51,456 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-12-14 06:31:51,468 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/data/7dd0f5400/05821c70d1544246b37ebdf9338c9d88/FLAG05555c960 [2022-12-14 06:31:51,801 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/data/7dd0f5400/05821c70d1544246b37ebdf9338c9d88 [2022-12-14 06:31:51,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:31:51,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:31:51,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:31:51,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:31:51,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:31:51,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:31:51" (1/1) ... [2022-12-14 06:31:51,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abc7c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:51, skipping insertion in model container [2022-12-14 06:31:51,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:31:51" (1/1) ... [2022-12-14 06:31:51,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:31:51,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:31:52,030 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-12-14 06:31:52,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:31:52,167 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:31:52,204 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-12-14 06:31:52,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:31:52,269 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:31:52,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52 WrapperNode [2022-12-14 06:31:52,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:31:52,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:31:52,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:31:52,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:31:52,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,325 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 808 [2022-12-14 06:31:52,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:31:52,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:31:52,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:31:52,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:31:52,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,357 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:31:52,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:31:52,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:31:52,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:31:52,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (1/1) ... [2022-12-14 06:31:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:31:52,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:31:52,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:31:52,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:31:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:31:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 06:31:52,424 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 06:31:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 06:31:52,424 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 06:31:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 06:31:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 06:31:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 06:31:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 06:31:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:31:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 06:31:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 06:31:52,535 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:31:52,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:31:53,293 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:31:53,773 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:31:53,774 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:31:53,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:31:53 BoogieIcfgContainer [2022-12-14 06:31:53,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:31:53,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:31:53,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:31:53,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:31:53,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:31:51" (1/3) ... [2022-12-14 06:31:53,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52731c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:31:53, skipping insertion in model container [2022-12-14 06:31:53,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:31:52" (2/3) ... [2022-12-14 06:31:53,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52731c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:31:53, skipping insertion in model container [2022-12-14 06:31:53,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:31:53" (3/3) ... [2022-12-14 06:31:53,783 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2022-12-14 06:31:53,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:31:53,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:31:53,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:31:53,853 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5c3653ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:31:53,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:31:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-12-14 06:31:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 06:31:53,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:31:53,873 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:31:53,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:31:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:31:53,878 INFO L85 PathProgramCache]: Analyzing trace with hash 381205060, now seen corresponding path program 1 times [2022-12-14 06:31:53,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:31:53,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286157739] [2022-12-14 06:31:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:53,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:31:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:31:54,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:31:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286157739] [2022-12-14 06:31:54,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286157739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:31:54,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:31:54,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:31:54,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871349203] [2022-12-14 06:31:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:31:54,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:31:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:31:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:31:54,514 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 06:31:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:31:55,130 INFO L93 Difference]: Finished difference Result 1069 states and 1731 transitions. [2022-12-14 06:31:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:31:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-12-14 06:31:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:31:55,157 INFO L225 Difference]: With dead ends: 1069 [2022-12-14 06:31:55,157 INFO L226 Difference]: Without dead ends: 694 [2022-12-14 06:31:55,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:31:55,169 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 511 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:31:55,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1731 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:31:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-12-14 06:31:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 686. [2022-12-14 06:31:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 465 states have (on average 1.5225806451612902) internal successors, (708), 495 states have internal predecessors, (708), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-12-14 06:31:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1069 transitions. [2022-12-14 06:31:55,255 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1069 transitions. Word has length 63 [2022-12-14 06:31:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:31:55,256 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1069 transitions. [2022-12-14 06:31:55,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 06:31:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1069 transitions. [2022-12-14 06:31:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 06:31:55,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:31:55,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:31:55,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:31:55,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:31:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:31:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2137391340, now seen corresponding path program 1 times [2022-12-14 06:31:55,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:31:55,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973976178] [2022-12-14 06:31:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:55,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:31:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:31:55,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:31:55,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973976178] [2022-12-14 06:31:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973976178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:31:55,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:31:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:31:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754928018] [2022-12-14 06:31:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:31:55,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:31:55,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:31:55,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:31:55,460 INFO L87 Difference]: Start difference. First operand 686 states and 1069 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 06:31:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:31:55,702 INFO L93 Difference]: Finished difference Result 1320 states and 2107 transitions. [2022-12-14 06:31:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:31:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-12-14 06:31:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:31:55,707 INFO L225 Difference]: With dead ends: 1320 [2022-12-14 06:31:55,707 INFO L226 Difference]: Without dead ends: 876 [2022-12-14 06:31:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:31:55,710 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:31:55,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1747 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:31:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-12-14 06:31:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 690. [2022-12-14 06:31:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 469 states have (on average 1.5181236673773988) internal successors, (712), 499 states have internal predecessors, (712), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-12-14 06:31:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1073 transitions. [2022-12-14 06:31:55,749 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1073 transitions. Word has length 68 [2022-12-14 06:31:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:31:55,750 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1073 transitions. [2022-12-14 06:31:55,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 06:31:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1073 transitions. [2022-12-14 06:31:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 06:31:55,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:31:55,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:31:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:31:55,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:31:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:31:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash -524615230, now seen corresponding path program 1 times [2022-12-14 06:31:55,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:31:55,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314248397] [2022-12-14 06:31:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:31:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:31:55,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:31:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314248397] [2022-12-14 06:31:55,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314248397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:31:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607844297] [2022-12-14 06:31:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:55,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:31:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:31:55,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:31:55,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:31:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:31:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:31:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:31:56,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:31:56,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607844297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:31:56,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:31:56,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 06:31:56,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538938989] [2022-12-14 06:31:56,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:31:56,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:31:56,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:31:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:31:56,377 INFO L87 Difference]: Start difference. First operand 690 states and 1073 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 06:31:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:31:56,864 INFO L93 Difference]: Finished difference Result 1143 states and 1781 transitions. [2022-12-14 06:31:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:31:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-12-14 06:31:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:31:56,870 INFO L225 Difference]: With dead ends: 1143 [2022-12-14 06:31:56,870 INFO L226 Difference]: Without dead ends: 698 [2022-12-14 06:31:56,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:31:56,874 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 419 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:31:56,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2295 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:31:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-12-14 06:31:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2022-12-14 06:31:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.515923566878981) internal successors, (714), 502 states have internal predecessors, (714), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-12-14 06:31:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1076 transitions. [2022-12-14 06:31:56,918 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1076 transitions. Word has length 72 [2022-12-14 06:31:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:31:56,918 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1076 transitions. [2022-12-14 06:31:56,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 06:31:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1076 transitions. [2022-12-14 06:31:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 06:31:56,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:31:56,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:31:56,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:31:57,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:31:57,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:31:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:31:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1933428857, now seen corresponding path program 1 times [2022-12-14 06:31:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:31:57,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293357273] [2022-12-14 06:31:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:31:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:31:57,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:31:57,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293357273] [2022-12-14 06:31:57,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293357273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:31:57,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126847850] [2022-12-14 06:31:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:57,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:31:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:31:57,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:31:57,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:31:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:31:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:31:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:31:57,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:31:57,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126847850] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:31:57,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:31:57,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 06:31:57,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020073247] [2022-12-14 06:31:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:31:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:31:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:31:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:31:57,638 INFO L87 Difference]: Start difference. First operand 694 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 06:31:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:31:57,837 INFO L93 Difference]: Finished difference Result 1242 states and 1958 transitions. [2022-12-14 06:31:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:31:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-12-14 06:31:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:31:57,840 INFO L225 Difference]: With dead ends: 1242 [2022-12-14 06:31:57,840 INFO L226 Difference]: Without dead ends: 694 [2022-12-14 06:31:57,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:31:57,843 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 269 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:31:57,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1544 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:31:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-12-14 06:31:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2022-12-14 06:31:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.4861995753715498) internal successors, (700), 502 states have internal predecessors, (700), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-12-14 06:31:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1062 transitions. [2022-12-14 06:31:57,869 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1062 transitions. Word has length 73 [2022-12-14 06:31:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:31:57,869 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1062 transitions. [2022-12-14 06:31:57,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 06:31:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1062 transitions. [2022-12-14 06:31:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 06:31:57,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:31:57,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:31:57,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:31:58,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 06:31:58,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:31:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:31:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1379315128, now seen corresponding path program 1 times [2022-12-14 06:31:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:31:58,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751440354] [2022-12-14 06:31:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:31:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:31:58,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:31:58,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751440354] [2022-12-14 06:31:58,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751440354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:31:58,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780033298] [2022-12-14 06:31:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:58,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:31:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:31:58,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:31:58,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:31:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:31:58,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:31:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:31:58,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:31:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:31:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780033298] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:31:58,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:31:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-12-14 06:31:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359963236] [2022-12-14 06:31:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:31:58,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:31:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:31:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:31:58,994 INFO L87 Difference]: Start difference. First operand 694 states and 1062 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 06:32:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:01,323 INFO L93 Difference]: Finished difference Result 1635 states and 2612 transitions. [2022-12-14 06:32:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 06:32:01,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-12-14 06:32:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:01,328 INFO L225 Difference]: With dead ends: 1635 [2022-12-14 06:32:01,328 INFO L226 Difference]: Without dead ends: 1275 [2022-12-14 06:32:01,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:32:01,331 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 2810 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 1312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2889 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 3755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1312 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:01,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2889 Valid, 2833 Invalid, 3755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1312 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 06:32:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-12-14 06:32:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1205. [2022-12-14 06:32:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 838 states have (on average 1.5023866348448687) internal successors, (1259), 885 states have internal predecessors, (1259), 292 states have call successors, (292), 73 states have call predecessors, (292), 74 states have return successors, (329), 282 states have call predecessors, (329), 287 states have call successors, (329) [2022-12-14 06:32:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1880 transitions. [2022-12-14 06:32:01,380 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1880 transitions. Word has length 75 [2022-12-14 06:32:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:01,380 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1880 transitions. [2022-12-14 06:32:01,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 06:32:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1880 transitions. [2022-12-14 06:32:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 06:32:01,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:01,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:01,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:32:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:01,583 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash 36172010, now seen corresponding path program 1 times [2022-12-14 06:32:01,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:01,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546741746] [2022-12-14 06:32:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:01,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:32:01,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546741746] [2022-12-14 06:32:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546741746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813309938] [2022-12-14 06:32:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:01,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:01,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:01,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:01,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:32:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:32:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:32:02,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:02,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813309938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:02,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:02,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:32:02,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106372422] [2022-12-14 06:32:02,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:02,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:32:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:32:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:32:02,174 INFO L87 Difference]: Start difference. First operand 1205 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 06:32:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:02,400 INFO L93 Difference]: Finished difference Result 3440 states and 5513 transitions. [2022-12-14 06:32:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:32:02,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2022-12-14 06:32:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:02,417 INFO L225 Difference]: With dead ends: 3440 [2022-12-14 06:32:02,417 INFO L226 Difference]: Without dead ends: 2247 [2022-12-14 06:32:02,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:32:02,426 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:02,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1341 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:32:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-12-14 06:32:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2191. [2022-12-14 06:32:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1534 states have (on average 1.5097783572359844) internal successors, (2316), 1629 states have internal predecessors, (2316), 516 states have call successors, (516), 131 states have call predecessors, (516), 140 states have return successors, (608), 502 states have call predecessors, (608), 511 states have call successors, (608) [2022-12-14 06:32:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 3440 transitions. [2022-12-14 06:32:02,548 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 3440 transitions. Word has length 76 [2022-12-14 06:32:02,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:02,548 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 3440 transitions. [2022-12-14 06:32:02,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 06:32:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 3440 transitions. [2022-12-14 06:32:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 06:32:02,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:02,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:02,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:32:02,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:02,750 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash 947611807, now seen corresponding path program 1 times [2022-12-14 06:32:02,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:02,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767464635] [2022-12-14 06:32:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:32:02,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767464635] [2022-12-14 06:32:02,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767464635] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:02,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712335677] [2022-12-14 06:32:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:02,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:02,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:02,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:32:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:03,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:32:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:32:03,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:03,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712335677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:03,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:03,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 06:32:03,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274906901] [2022-12-14 06:32:03,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:03,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:32:03,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:32:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:03,219 INFO L87 Difference]: Start difference. First operand 2191 states and 3440 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 06:32:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:03,464 INFO L93 Difference]: Finished difference Result 5112 states and 8137 transitions. [2022-12-14 06:32:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:32:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-12-14 06:32:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:03,476 INFO L225 Difference]: With dead ends: 5112 [2022-12-14 06:32:03,476 INFO L226 Difference]: Without dead ends: 2933 [2022-12-14 06:32:03,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:03,483 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 521 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:03,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1080 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:32:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-12-14 06:32:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2889. [2022-12-14 06:32:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (797), 652 states have call predecessors, (797), 664 states have call successors, (797) [2022-12-14 06:32:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4555 transitions. [2022-12-14 06:32:03,596 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4555 transitions. Word has length 75 [2022-12-14 06:32:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:03,597 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4555 transitions. [2022-12-14 06:32:03,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 06:32:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4555 transitions. [2022-12-14 06:32:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 06:32:03,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:03,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:03,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 06:32:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:03,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1328908982, now seen corresponding path program 1 times [2022-12-14 06:32:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:03,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110891257] [2022-12-14 06:32:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:32:04,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:04,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110891257] [2022-12-14 06:32:04,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110891257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:04,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772508464] [2022-12-14 06:32:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:04,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:04,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:04,139 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:04,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:32:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:32:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:32:04,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:04,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772508464] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:04,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:04,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 06:32:04,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609394008] [2022-12-14 06:32:04,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:04,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:32:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:32:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:04,467 INFO L87 Difference]: Start difference. First operand 2889 states and 4555 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:32:05,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:05,001 INFO L93 Difference]: Finished difference Result 5184 states and 8208 transitions. [2022-12-14 06:32:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:32:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-12-14 06:32:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:05,012 INFO L225 Difference]: With dead ends: 5184 [2022-12-14 06:32:05,012 INFO L226 Difference]: Without dead ends: 2897 [2022-12-14 06:32:05,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:32:05,021 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 396 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:05,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2513 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:32:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-12-14 06:32:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2889. [2022-12-14 06:32:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (793), 652 states have call predecessors, (793), 664 states have call successors, (793) [2022-12-14 06:32:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4551 transitions. [2022-12-14 06:32:05,146 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4551 transitions. Word has length 79 [2022-12-14 06:32:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:05,147 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4551 transitions. [2022-12-14 06:32:05,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:32:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4551 transitions. [2022-12-14 06:32:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 06:32:05,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:05,149 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:32:05,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:32:05,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 06:32:05,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 33869413, now seen corresponding path program 1 times [2022-12-14 06:32:05,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424527331] [2022-12-14 06:32:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:05,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:32:05,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424527331] [2022-12-14 06:32:05,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424527331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874596104] [2022-12-14 06:32:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:05,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:05,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:32:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:05,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:32:05,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:32:05,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:05,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874596104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:05,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:05,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 06:32:05,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246396221] [2022-12-14 06:32:05,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:05,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:32:05,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:32:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:05,801 INFO L87 Difference]: Start difference. First operand 2889 states and 4551 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 06:32:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:06,007 INFO L93 Difference]: Finished difference Result 5459 states and 8715 transitions. [2022-12-14 06:32:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:32:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-12-14 06:32:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:06,019 INFO L225 Difference]: With dead ends: 5459 [2022-12-14 06:32:06,019 INFO L226 Difference]: Without dead ends: 3010 [2022-12-14 06:32:06,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:06,028 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:06,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2204 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:32:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-12-14 06:32:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2933. [2022-12-14 06:32:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2065 states have (on average 1.510411622276029) internal successors, (3119), 2198 states have internal predecessors, (3119), 669 states have call successors, (669), 170 states have call predecessors, (669), 198 states have return successors, (833), 660 states have call predecessors, (833), 664 states have call successors, (833) [2022-12-14 06:32:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4621 transitions. [2022-12-14 06:32:06,150 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4621 transitions. Word has length 99 [2022-12-14 06:32:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:06,150 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 4621 transitions. [2022-12-14 06:32:06,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 06:32:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4621 transitions. [2022-12-14 06:32:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 06:32:06,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:06,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:06,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:32:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 06:32:06,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash -293798570, now seen corresponding path program 1 times [2022-12-14 06:32:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:06,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569605966] [2022-12-14 06:32:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 06:32:06,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569605966] [2022-12-14 06:32:06,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569605966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606544028] [2022-12-14 06:32:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:06,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:06,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:06,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:32:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:32:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:32:06,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:06,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606544028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:06,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:06,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 06:32:06,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496538148] [2022-12-14 06:32:06,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:06,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:32:06,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:32:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:06,827 INFO L87 Difference]: Start difference. First operand 2933 states and 4621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 06:32:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:07,037 INFO L93 Difference]: Finished difference Result 6625 states and 10624 transitions. [2022-12-14 06:32:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:32:07,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2022-12-14 06:32:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:07,052 INFO L225 Difference]: With dead ends: 6625 [2022-12-14 06:32:07,052 INFO L226 Difference]: Without dead ends: 3704 [2022-12-14 06:32:07,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:07,063 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 529 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:07,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1282 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:32:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-12-14 06:32:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-12-14 06:32:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.512412723041117) internal successors, (3899), 2745 states have internal predecessors, (3899), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-12-14 06:32:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5761 transitions. [2022-12-14 06:32:07,215 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5761 transitions. Word has length 117 [2022-12-14 06:32:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:07,215 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5761 transitions. [2022-12-14 06:32:07,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 06:32:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5761 transitions. [2022-12-14 06:32:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 06:32:07,221 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:07,221 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:07,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:32:07,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:07,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2126219689, now seen corresponding path program 1 times [2022-12-14 06:32:07,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:07,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461638706] [2022-12-14 06:32:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:07,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:32:07,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461638706] [2022-12-14 06:32:07,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461638706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:07,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297817808] [2022-12-14 06:32:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:07,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:07,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:07,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:32:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:32:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:32:07,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:07,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297817808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:07,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:07,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 06:32:07,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109223731] [2022-12-14 06:32:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:07,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:32:07,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:07,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:32:07,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:07,967 INFO L87 Difference]: Start difference. First operand 3648 states and 5761 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-12-14 06:32:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:08,208 INFO L93 Difference]: Finished difference Result 7340 states and 11753 transitions. [2022-12-14 06:32:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:32:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-12-14 06:32:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:08,220 INFO L225 Difference]: With dead ends: 7340 [2022-12-14 06:32:08,220 INFO L226 Difference]: Without dead ends: 3704 [2022-12-14 06:32:08,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:08,230 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:08,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1492 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:32:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-12-14 06:32:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-12-14 06:32:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.5096974398758727) internal successors, (3892), 2745 states have internal predecessors, (3892), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-12-14 06:32:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5754 transitions. [2022-12-14 06:32:08,365 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5754 transitions. Word has length 118 [2022-12-14 06:32:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:08,365 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5754 transitions. [2022-12-14 06:32:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-12-14 06:32:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5754 transitions. [2022-12-14 06:32:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 06:32:08,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:08,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:08,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:32:08,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:08,571 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1626501346, now seen corresponding path program 1 times [2022-12-14 06:32:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779279856] [2022-12-14 06:32:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 06:32:08,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:08,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779279856] [2022-12-14 06:32:08,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779279856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:08,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758117673] [2022-12-14 06:32:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:08,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:08,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:08,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:08,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:32:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:32:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:32:09,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:09,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758117673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:09,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:09,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 06:32:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971620923] [2022-12-14 06:32:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:09,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:32:09,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:32:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:32:09,072 INFO L87 Difference]: Start difference. First operand 3648 states and 5754 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 06:32:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:11,135 INFO L93 Difference]: Finished difference Result 8197 states and 13092 transitions. [2022-12-14 06:32:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:32:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-12-14 06:32:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:11,150 INFO L225 Difference]: With dead ends: 8197 [2022-12-14 06:32:11,151 INFO L226 Difference]: Without dead ends: 4435 [2022-12-14 06:32:11,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:32:11,159 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1604 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:11,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 1528 Invalid, 4673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 06:32:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2022-12-14 06:32:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3643. [2022-12-14 06:32:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2573 states have (on average 1.5102992615623785) internal successors, (3886), 2740 states have internal predecessors, (3886), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-12-14 06:32:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5748 transitions. [2022-12-14 06:32:11,318 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5748 transitions. Word has length 117 [2022-12-14 06:32:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:11,319 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5748 transitions. [2022-12-14 06:32:11,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 06:32:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5748 transitions. [2022-12-14 06:32:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:32:11,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:11,322 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:11,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:32:11,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:32:11,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash 105963975, now seen corresponding path program 1 times [2022-12-14 06:32:11,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:11,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266957187] [2022-12-14 06:32:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:11,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:32:11,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:11,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266957187] [2022-12-14 06:32:11,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266957187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:11,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726014654] [2022-12-14 06:32:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:11,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:11,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:11,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:11,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:32:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:11,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:32:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:32:12,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:12,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726014654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:12,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:12,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 06:32:12,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57391225] [2022-12-14 06:32:12,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:12,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:32:12,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:32:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:32:12,032 INFO L87 Difference]: Start difference. First operand 3643 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:32:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:12,788 INFO L93 Difference]: Finished difference Result 7538 states and 12125 transitions. [2022-12-14 06:32:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:32:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-12-14 06:32:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:12,803 INFO L225 Difference]: With dead ends: 7538 [2022-12-14 06:32:12,803 INFO L226 Difference]: Without dead ends: 4514 [2022-12-14 06:32:12,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:32:12,812 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 673 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:12,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1172 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:32:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2022-12-14 06:32:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4401. [2022-12-14 06:32:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 3011 states have (on average 1.4985054799070077) internal successors, (4512), 3226 states have internal predecessors, (4512), 1081 states have call successors, (1081), 279 states have call predecessors, (1081), 308 states have return successors, (1351), 1063 states have call predecessors, (1351), 1074 states have call successors, (1351) [2022-12-14 06:32:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 6944 transitions. [2022-12-14 06:32:13,036 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 6944 transitions. Word has length 123 [2022-12-14 06:32:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:13,037 INFO L495 AbstractCegarLoop]: Abstraction has 4401 states and 6944 transitions. [2022-12-14 06:32:13,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:32:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 6944 transitions. [2022-12-14 06:32:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 06:32:13,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:13,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:13,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:32:13,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:32:13,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:13,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1414632865, now seen corresponding path program 1 times [2022-12-14 06:32:13,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:13,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417893120] [2022-12-14 06:32:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:13,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:32:13,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417893120] [2022-12-14 06:32:13,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417893120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80691881] [2022-12-14 06:32:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:13,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:13,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:13,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:32:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:13,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:32:13,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:32:13,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:13,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80691881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:13,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:13,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 06:32:13,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664750404] [2022-12-14 06:32:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:13,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:32:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:32:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:32:13,754 INFO L87 Difference]: Start difference. First operand 4401 states and 6944 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:32:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:14,860 INFO L93 Difference]: Finished difference Result 11083 states and 17801 transitions. [2022-12-14 06:32:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:32:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-12-14 06:32:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:14,882 INFO L225 Difference]: With dead ends: 11083 [2022-12-14 06:32:14,882 INFO L226 Difference]: Without dead ends: 7279 [2022-12-14 06:32:14,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:32:14,897 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:32:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2022-12-14 06:32:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2022-12-14 06:32:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7261 states, 4887 states have (on average 1.4923265807243709) internal successors, (7293), 5268 states have internal predecessors, (7293), 1869 states have call successors, (1869), 473 states have call predecessors, (1869), 504 states have return successors, (2297), 1831 states have call predecessors, (2297), 1858 states have call successors, (2297) [2022-12-14 06:32:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 11459 transitions. [2022-12-14 06:32:15,253 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 11459 transitions. Word has length 124 [2022-12-14 06:32:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:15,254 INFO L495 AbstractCegarLoop]: Abstraction has 7261 states and 11459 transitions. [2022-12-14 06:32:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:32:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 11459 transitions. [2022-12-14 06:32:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:32:15,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:15,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:15,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 06:32:15,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:15,459 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 556728831, now seen corresponding path program 1 times [2022-12-14 06:32:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746341509] [2022-12-14 06:32:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:15,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:32:15,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:15,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746341509] [2022-12-14 06:32:15,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746341509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:15,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758883578] [2022-12-14 06:32:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:15,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:15,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:15,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:15,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:32:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:32:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:32:15,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:15,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758883578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:15,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:15,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-12-14 06:32:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379191414] [2022-12-14 06:32:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:15,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:32:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:32:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:32:15,960 INFO L87 Difference]: Start difference. First operand 7261 states and 11459 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 06:32:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:17,325 INFO L93 Difference]: Finished difference Result 18186 states and 29039 transitions. [2022-12-14 06:32:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:32:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-12-14 06:32:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:17,373 INFO L225 Difference]: With dead ends: 18186 [2022-12-14 06:32:17,373 INFO L226 Difference]: Without dead ends: 11544 [2022-12-14 06:32:17,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:32:17,412 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 655 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:17,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 4248 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:32:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2022-12-14 06:32:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10469. [2022-12-14 06:32:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 6995 states have (on average 1.4932094353109364) internal successors, (10445), 7562 states have internal predecessors, (10445), 2765 states have call successors, (2765), 667 states have call predecessors, (2765), 708 states have return successors, (3474), 2719 states have call predecessors, (3474), 2748 states have call successors, (3474) [2022-12-14 06:32:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 16684 transitions. [2022-12-14 06:32:18,036 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 16684 transitions. Word has length 125 [2022-12-14 06:32:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:18,036 INFO L495 AbstractCegarLoop]: Abstraction has 10469 states and 16684 transitions. [2022-12-14 06:32:18,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 06:32:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 16684 transitions. [2022-12-14 06:32:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 06:32:18,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:18,041 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:18,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 06:32:18,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:32:18,242 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:18,243 INFO L85 PathProgramCache]: Analyzing trace with hash 823819287, now seen corresponding path program 1 times [2022-12-14 06:32:18,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:18,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187330135] [2022-12-14 06:32:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:18,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 06:32:18,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:18,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187330135] [2022-12-14 06:32:18,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187330135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067431334] [2022-12-14 06:32:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:18,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:18,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:18,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:32:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:19,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 06:32:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:32:19,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:19,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067431334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:19,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:19,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-12-14 06:32:19,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706738588] [2022-12-14 06:32:19,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:19,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:32:19,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:32:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:32:19,237 INFO L87 Difference]: Start difference. First operand 10469 states and 16684 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 06:32:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:20,731 INFO L93 Difference]: Finished difference Result 21122 states and 34047 transitions. [2022-12-14 06:32:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:32:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 141 [2022-12-14 06:32:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:20,764 INFO L225 Difference]: With dead ends: 21122 [2022-12-14 06:32:20,764 INFO L226 Difference]: Without dead ends: 9612 [2022-12-14 06:32:20,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:32:20,817 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 684 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:20,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 3091 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:32:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2022-12-14 06:32:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 9250. [2022-12-14 06:32:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9250 states, 6222 states have (on average 1.4909996785599486) internal successors, (9277), 6684 states have internal predecessors, (9277), 2378 states have call successors, (2378), 621 states have call predecessors, (2378), 649 states have return successors, (3037), 2352 states have call predecessors, (3037), 2356 states have call successors, (3037) [2022-12-14 06:32:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9250 states to 9250 states and 14692 transitions. [2022-12-14 06:32:21,347 INFO L78 Accepts]: Start accepts. Automaton has 9250 states and 14692 transitions. Word has length 141 [2022-12-14 06:32:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:21,347 INFO L495 AbstractCegarLoop]: Abstraction has 9250 states and 14692 transitions. [2022-12-14 06:32:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 06:32:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9250 states and 14692 transitions. [2022-12-14 06:32:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:32:21,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:21,352 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:21,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 06:32:21,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:32:21,553 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash 278659913, now seen corresponding path program 1 times [2022-12-14 06:32:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130283037] [2022-12-14 06:32:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:21,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 06:32:21,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130283037] [2022-12-14 06:32:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130283037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787973362] [2022-12-14 06:32:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:21,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:21,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:21,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:21,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:32:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:32:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:32:21,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:32:21,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787973362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:21,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:21,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 06:32:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202345135] [2022-12-14 06:32:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:32:21,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:32:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:32:21,983 INFO L87 Difference]: Start difference. First operand 9250 states and 14692 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:32:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:22,785 INFO L93 Difference]: Finished difference Result 18976 states and 30498 transitions. [2022-12-14 06:32:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:32:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 130 [2022-12-14 06:32:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:22,817 INFO L225 Difference]: With dead ends: 18976 [2022-12-14 06:32:22,818 INFO L226 Difference]: Without dead ends: 9250 [2022-12-14 06:32:22,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:32:22,862 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 186 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:22,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1545 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:32:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9250 states. [2022-12-14 06:32:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9250 to 9250. [2022-12-14 06:32:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9250 states, 6222 states have (on average 1.4733204757312761) internal successors, (9167), 6684 states have internal predecessors, (9167), 2378 states have call successors, (2378), 621 states have call predecessors, (2378), 649 states have return successors, (3037), 2352 states have call predecessors, (3037), 2356 states have call successors, (3037) [2022-12-14 06:32:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9250 states to 9250 states and 14582 transitions. [2022-12-14 06:32:23,461 INFO L78 Accepts]: Start accepts. Automaton has 9250 states and 14582 transitions. Word has length 130 [2022-12-14 06:32:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:23,461 INFO L495 AbstractCegarLoop]: Abstraction has 9250 states and 14582 transitions. [2022-12-14 06:32:23,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:32:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9250 states and 14582 transitions. [2022-12-14 06:32:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:32:23,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:23,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:23,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 06:32:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:23,668 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash -667851884, now seen corresponding path program 1 times [2022-12-14 06:32:23,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:23,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311419840] [2022-12-14 06:32:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:23,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 06:32:23,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311419840] [2022-12-14 06:32:23,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311419840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528372145] [2022-12-14 06:32:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:23,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:23,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:23,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 06:32:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:24,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:32:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:32:24,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:32:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 06:32:24,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528372145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:32:24,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440792242] [2022-12-14 06:32:24,331 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-12-14 06:32:24,331 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:32:24,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:32:24,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:32:24,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:32:29,812 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 06:33:11,519 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 36 for LOIs [2022-12-14 06:33:11,522 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 46 for LOIs [2022-12-14 06:33:11,631 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 454 for LOIs [2022-12-14 06:33:11,799 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 81 for LOIs [2022-12-14 06:33:11,814 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 06:33:14,153 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 06:33:14,397 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 50 for LOIs [2022-12-14 06:33:14,412 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 72 for LOIs [2022-12-14 06:33:14,418 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 06:33:17,817 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 06:33:18,385 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 06:33:18,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:34:02,074 WARN L233 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 683 DAG size of output: 649 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:34:11,505 WARN L233 SmtUtils]: Spent 9.13s on a formula simplification. DAG size of input: 639 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:34:20,835 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 674 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:34:30,907 WARN L233 SmtUtils]: Spent 9.71s on a formula simplification. DAG size of input: 674 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:34:40,606 WARN L233 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 675 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:34:51,267 WARN L233 SmtUtils]: Spent 9.65s on a formula simplification. DAG size of input: 686 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:35:02,044 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 676 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:35:23,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '275966#(and (not (= ~calls_0~0 0)) (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (<= 0 (+ ~calls_0~0 2147483648)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (not (= ~doorState~0 1)) (<= ~calls_0~0 2147483647) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:23,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:23,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:23,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-14 06:35:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153762181] [2022-12-14 06:35:23,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:23,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:35:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:35:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 06:35:23,135 INFO L87 Difference]: Start difference. First operand 9250 states and 14582 transitions. Second operand has 18 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 7 states have call successors, (49), 4 states have call predecessors, (49), 9 states have return successors, (48), 10 states have call predecessors, (48), 7 states have call successors, (48) [2022-12-14 06:35:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:36,912 INFO L93 Difference]: Finished difference Result 42911 states and 72828 transitions. [2022-12-14 06:35:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 06:35:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 7 states have call successors, (49), 4 states have call predecessors, (49), 9 states have return successors, (48), 10 states have call predecessors, (48), 7 states have call successors, (48) Word has length 134 [2022-12-14 06:35:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:37,071 INFO L225 Difference]: With dead ends: 42911 [2022-12-14 06:35:37,071 INFO L226 Difference]: Without dead ends: 33656 [2022-12-14 06:35:37,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 352 SyntacticMatches, 14 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8768 ImplicationChecksByTransitivity, 126.6s TimeCoverageRelationStatistics Valid=1393, Invalid=20659, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 06:35:37,161 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 6028 mSDsluCounter, 7207 mSDsCounter, 0 mSdLazyCounter, 19476 mSolverCounterSat, 4562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6206 SdHoareTripleChecker+Valid, 8040 SdHoareTripleChecker+Invalid, 24038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4562 IncrementalHoareTripleChecker+Valid, 19476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:37,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6206 Valid, 8040 Invalid, 24038 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4562 Valid, 19476 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-12-14 06:35:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33656 states. [2022-12-14 06:35:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33656 to 26179. [2022-12-14 06:35:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26179 states, 17302 states have (on average 1.4815050283204254) internal successors, (25633), 19056 states have internal predecessors, (25633), 7241 states have call successors, (7241), 1531 states have call predecessors, (7241), 1635 states have return successors, (9957), 6602 states have call predecessors, (9957), 7199 states have call successors, (9957) [2022-12-14 06:35:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26179 states to 26179 states and 42831 transitions. [2022-12-14 06:35:39,057 INFO L78 Accepts]: Start accepts. Automaton has 26179 states and 42831 transitions. Word has length 134 [2022-12-14 06:35:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:39,057 INFO L495 AbstractCegarLoop]: Abstraction has 26179 states and 42831 transitions. [2022-12-14 06:35:39,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 7 states have call successors, (49), 4 states have call predecessors, (49), 9 states have return successors, (48), 10 states have call predecessors, (48), 7 states have call successors, (48) [2022-12-14 06:35:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 26179 states and 42831 transitions. [2022-12-14 06:35:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:35:39,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:39,064 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:39,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 06:35:39,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:35:39,265 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 47839282, now seen corresponding path program 1 times [2022-12-14 06:35:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:39,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248052296] [2022-12-14 06:35:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 06:35:39,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:39,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248052296] [2022-12-14 06:35:39,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248052296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:39,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408511737] [2022-12-14 06:35:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:39,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:39,808 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:39,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 06:35:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 06:35:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:35:40,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:35:40,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408511737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:35:40,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:35:40,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-12-14 06:35:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571122618] [2022-12-14 06:35:40,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:35:40,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:35:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:35:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:35:40,124 INFO L87 Difference]: Start difference. First operand 26179 states and 42831 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 06:35:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:42,676 INFO L93 Difference]: Finished difference Result 49614 states and 81374 transitions. [2022-12-14 06:35:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:35:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-12-14 06:35:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:42,830 INFO L225 Difference]: With dead ends: 49614 [2022-12-14 06:35:42,830 INFO L226 Difference]: Without dead ends: 24553 [2022-12-14 06:35:42,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:35:42,946 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 589 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 4504 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:42,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 4504 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:35:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24553 states. [2022-12-14 06:35:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24553 to 24337. [2022-12-14 06:35:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24337 states, 16061 states have (on average 1.4790486271091463) internal successors, (23755), 17715 states have internal predecessors, (23755), 6727 states have call successors, (6727), 1429 states have call predecessors, (6727), 1548 states have return successors, (9005), 6107 states have call predecessors, (9005), 6687 states have call successors, (9005) [2022-12-14 06:35:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24337 states to 24337 states and 39487 transitions. [2022-12-14 06:35:44,433 INFO L78 Accepts]: Start accepts. Automaton has 24337 states and 39487 transitions. Word has length 139 [2022-12-14 06:35:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:44,433 INFO L495 AbstractCegarLoop]: Abstraction has 24337 states and 39487 transitions. [2022-12-14 06:35:44,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 06:35:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 24337 states and 39487 transitions. [2022-12-14 06:35:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 06:35:44,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:44,440 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:44,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 06:35:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:44,642 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 680573078, now seen corresponding path program 1 times [2022-12-14 06:35:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714657190] [2022-12-14 06:35:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 06:35:44,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714657190] [2022-12-14 06:35:44,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714657190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174096867] [2022-12-14 06:35:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:44,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:44,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:44,915 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:44,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 06:35:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:35:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:35:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:35:45,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174096867] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:45,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548269008] [2022-12-14 06:35:45,524 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 06:35:45,524 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:45,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:45,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:45,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:49,386 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-12-14 06:35:54,961 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2022-12-14 06:35:55,305 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 06:35:57,386 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 06:35:57,589 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-12-14 06:35:57,664 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 06:36:01,074 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 06:36:01,655 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 06:36:01,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:37:01,271 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 527 DAG size of output: 446 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:37:18,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [548269008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:18,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:37:18,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 39 [2022-12-14 06:37:18,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84576651] [2022-12-14 06:37:18,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:18,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 06:37:18,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 06:37:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 06:37:18,199 INFO L87 Difference]: Start difference. First operand 24337 states and 39487 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 06:37:36,428 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 589 DAG size of output: 572 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:37:43,702 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 595 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:38:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:07,122 INFO L93 Difference]: Finished difference Result 48758 states and 78769 transitions. [2022-12-14 06:38:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 06:38:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-12-14 06:38:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:07,228 INFO L225 Difference]: With dead ends: 48758 [2022-12-14 06:38:07,229 INFO L226 Difference]: Without dead ends: 24459 [2022-12-14 06:38:07,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 383 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 100.4s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 06:38:07,342 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 156 mSDsluCounter, 4191 mSDsCounter, 0 mSdLazyCounter, 5718 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 4761 SdHoareTripleChecker+Invalid, 5757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:07,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 4761 Invalid, 5757 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 5718 Invalid, 0 Unknown, 0 Unchecked, 23.2s Time] [2022-12-14 06:38:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24459 states. [2022-12-14 06:38:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24459 to 24380. [2022-12-14 06:38:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24380 states, 16094 states have (on average 1.478314899962719) internal successors, (23792), 17747 states have internal predecessors, (23792), 6733 states have call successors, (6733), 1434 states have call predecessors, (6733), 1552 states have return successors, (9011), 6113 states have call predecessors, (9011), 6693 states have call successors, (9011) [2022-12-14 06:38:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24380 states to 24380 states and 39536 transitions. [2022-12-14 06:38:08,954 INFO L78 Accepts]: Start accepts. Automaton has 24380 states and 39536 transitions. Word has length 140 [2022-12-14 06:38:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:08,954 INFO L495 AbstractCegarLoop]: Abstraction has 24380 states and 39536 transitions. [2022-12-14 06:38:08,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 06:38:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 24380 states and 39536 transitions. [2022-12-14 06:38:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:38:08,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:08,961 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:38:08,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 06:38:09,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:38:09,162 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1300066319, now seen corresponding path program 1 times [2022-12-14 06:38:09,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:09,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718810877] [2022-12-14 06:38:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:09,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 06:38:09,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:09,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718810877] [2022-12-14 06:38:09,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718810877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:38:09,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635671215] [2022-12-14 06:38:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:09,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:38:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:38:09,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:38:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 06:38:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:38:09,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:38:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 06:38:09,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:38:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635671215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:09,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:38:09,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-12-14 06:38:09,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365827702] [2022-12-14 06:38:09,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:09,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:38:09,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:09,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:38:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:38:09,976 INFO L87 Difference]: Start difference. First operand 24380 states and 39536 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 06:38:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:12,397 INFO L93 Difference]: Finished difference Result 47630 states and 77036 transitions. [2022-12-14 06:38:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:38:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-12-14 06:38:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:12,484 INFO L225 Difference]: With dead ends: 47630 [2022-12-14 06:38:12,484 INFO L226 Difference]: Without dead ends: 24443 [2022-12-14 06:38:12,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:38:12,588 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 551 mSDsluCounter, 3952 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 4895 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:12,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 4895 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:38:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24443 states. [2022-12-14 06:38:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24443 to 24428. [2022-12-14 06:38:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24428 states, 16142 states have (on average 1.4768925783669928) internal successors, (23840), 17771 states have internal predecessors, (23840), 6733 states have call successors, (6733), 1458 states have call predecessors, (6733), 1552 states have return successors, (8963), 6113 states have call predecessors, (8963), 6693 states have call successors, (8963) [2022-12-14 06:38:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24428 states to 24428 states and 39536 transitions. [2022-12-14 06:38:14,184 INFO L78 Accepts]: Start accepts. Automaton has 24428 states and 39536 transitions. Word has length 142 [2022-12-14 06:38:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:14,184 INFO L495 AbstractCegarLoop]: Abstraction has 24428 states and 39536 transitions. [2022-12-14 06:38:14,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 06:38:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 24428 states and 39536 transitions. [2022-12-14 06:38:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 06:38:14,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:14,191 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:38:14,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 06:38:14,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:38:14,392 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash 650783457, now seen corresponding path program 1 times [2022-12-14 06:38:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:14,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405668344] [2022-12-14 06:38:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 06:38:14,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405668344] [2022-12-14 06:38:14,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405668344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:38:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20957874] [2022-12-14 06:38:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:14,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:38:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:38:14,935 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:38:14,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 06:38:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:38:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:38:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:38:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:38:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 06:38:15,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20957874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:38:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58507694] [2022-12-14 06:38:15,590 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-12-14 06:38:15,590 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:38:15,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:38:15,590 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:38:15,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:38:21,040 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 663 for LOIs [2022-12-14 06:38:28,045 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 26 for LOIs [2022-12-14 06:38:28,046 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 39 for LOIs [2022-12-14 06:38:28,155 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 61 for LOIs [2022-12-14 06:38:28,169 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 48 for LOIs [2022-12-14 06:38:28,180 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 06:38:30,280 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 06:38:30,475 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-12-14 06:38:30,536 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 54 for LOIs [2022-12-14 06:38:30,541 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 71 for LOIs [2022-12-14 06:38:30,547 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 06:38:33,980 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 06:38:34,546 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 06:38:34,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:39:34,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '686730#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:39:34,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:39:34,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:39:34,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 10] total 29 [2022-12-14 06:39:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955348711] [2022-12-14 06:39:34,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:39:34,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 06:39:34,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:34,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 06:39:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=10918, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 06:39:34,897 INFO L87 Difference]: Start difference. First operand 24428 states and 39536 transitions. Second operand has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-12-14 06:39:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:51,320 INFO L93 Difference]: Finished difference Result 69434 states and 116469 transitions. [2022-12-14 06:39:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 06:39:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) Word has length 146 [2022-12-14 06:39:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:51,534 INFO L225 Difference]: With dead ends: 69434 [2022-12-14 06:39:51,534 INFO L226 Difference]: Without dead ends: 45783 [2022-12-14 06:39:51,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 375 SyntacticMatches, 7 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16766 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=3338, Invalid=37264, Unknown=0, NotChecked=0, Total=40602 [2022-12-14 06:39:51,750 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 7379 mSDsluCounter, 7018 mSDsCounter, 0 mSdLazyCounter, 21502 mSolverCounterSat, 5514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7379 SdHoareTripleChecker+Valid, 7551 SdHoareTripleChecker+Invalid, 27016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5514 IncrementalHoareTripleChecker+Valid, 21502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:51,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7379 Valid, 7551 Invalid, 27016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5514 Valid, 21502 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-12-14 06:39:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45783 states. [2022-12-14 06:39:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45783 to 41747. [2022-12-14 06:39:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41747 states, 27606 states have (on average 1.4636673186988336) internal successors, (40406), 30435 states have internal predecessors, (40406), 11476 states have call successors, (11476), 2480 states have call predecessors, (11476), 2664 states have return successors, (15909), 10464 states have call predecessors, (15909), 11414 states have call successors, (15909) [2022-12-14 06:39:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41747 states to 41747 states and 67791 transitions. [2022-12-14 06:39:55,310 INFO L78 Accepts]: Start accepts. Automaton has 41747 states and 67791 transitions. Word has length 146 [2022-12-14 06:39:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:55,310 INFO L495 AbstractCegarLoop]: Abstraction has 41747 states and 67791 transitions. [2022-12-14 06:39:55,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-12-14 06:39:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 41747 states and 67791 transitions. [2022-12-14 06:39:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 06:39:55,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:55,314 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:55,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 06:39:55,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:39:55,515 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:39:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 746028625, now seen corresponding path program 1 times [2022-12-14 06:39:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:55,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268393576] [2022-12-14 06:39:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:39:55,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268393576] [2022-12-14 06:39:55,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268393576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:55,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:55,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:39:55,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929910445] [2022-12-14 06:39:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:39:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:39:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:39:55,705 INFO L87 Difference]: Start difference. First operand 41747 states and 67791 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:39:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:59,346 INFO L93 Difference]: Finished difference Result 81996 states and 135283 transitions. [2022-12-14 06:39:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:39:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-12-14 06:39:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:59,528 INFO L225 Difference]: With dead ends: 81996 [2022-12-14 06:39:59,528 INFO L226 Difference]: Without dead ends: 42071 [2022-12-14 06:39:59,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:39:59,770 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 13 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:59,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2196 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42071 states. [2022-12-14 06:40:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42071 to 41531. [2022-12-14 06:40:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41531 states, 27519 states have (on average 1.4623351139212908) internal successors, (40242), 30358 states have internal predecessors, (40242), 11311 states have call successors, (11311), 2385 states have call predecessors, (11311), 2700 states have return successors, (15881), 10420 states have call predecessors, (15881), 11254 states have call successors, (15881) [2022-12-14 06:40:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41531 states to 41531 states and 67434 transitions. [2022-12-14 06:40:03,455 INFO L78 Accepts]: Start accepts. Automaton has 41531 states and 67434 transitions. Word has length 146 [2022-12-14 06:40:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:03,456 INFO L495 AbstractCegarLoop]: Abstraction has 41531 states and 67434 transitions. [2022-12-14 06:40:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:40:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 41531 states and 67434 transitions. [2022-12-14 06:40:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 06:40:03,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:03,461 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 06:40:03,461 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:40:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash 165375128, now seen corresponding path program 1 times [2022-12-14 06:40:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293457309] [2022-12-14 06:40:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 06:40:03,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:03,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293457309] [2022-12-14 06:40:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293457309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:40:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160465049] [2022-12-14 06:40:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:03,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:40:03,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:40:03,679 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:40:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 06:40:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:40:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:40:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 06:40:03,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:40:03,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160465049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:03,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:40:03,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-14 06:40:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348627086] [2022-12-14 06:40:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:40:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:03,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:40:03,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:40:03,939 INFO L87 Difference]: Start difference. First operand 41531 states and 67434 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:40:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:08,843 INFO L93 Difference]: Finished difference Result 81465 states and 133642 transitions. [2022-12-14 06:40:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:40:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 156 [2022-12-14 06:40:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:09,057 INFO L225 Difference]: With dead ends: 81465 [2022-12-14 06:40:09,057 INFO L226 Difference]: Without dead ends: 41764 [2022-12-14 06:40:09,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:40:09,334 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 461 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:09,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 2738 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:40:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41764 states. [2022-12-14 06:40:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41764 to 41480. [2022-12-14 06:40:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41480 states, 27487 states have (on average 1.462582311638229) internal successors, (40202), 30321 states have internal predecessors, (40202), 11304 states have call successors, (11304), 2381 states have call predecessors, (11304), 2688 states have return successors, (15854), 10410 states have call predecessors, (15854), 11247 states have call successors, (15854) [2022-12-14 06:40:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41480 states to 41480 states and 67360 transitions. [2022-12-14 06:40:12,726 INFO L78 Accepts]: Start accepts. Automaton has 41480 states and 67360 transitions. Word has length 156 [2022-12-14 06:40:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:12,727 INFO L495 AbstractCegarLoop]: Abstraction has 41480 states and 67360 transitions. [2022-12-14 06:40:12,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:40:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 41480 states and 67360 transitions. [2022-12-14 06:40:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 06:40:12,732 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:12,732 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:12,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 06:40:12,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 06:40:12,933 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:40:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 163741051, now seen corresponding path program 1 times [2022-12-14 06:40:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:12,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131085013] [2022-12-14 06:40:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 06:40:13,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:13,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131085013] [2022-12-14 06:40:13,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131085013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:40:13,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550643784] [2022-12-14 06:40:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:13,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:40:13,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:40:13,178 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:40:13,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 06:40:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:40:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:40:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:40:13,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:40:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 06:40:13,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550643784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:40:13,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482681689] [2022-12-14 06:40:13,930 INFO L159 IcfgInterpreter]: Started Sifa with 120 locations of interest [2022-12-14 06:40:13,931 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:40:13,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:40:13,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:40:13,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:40:17,594 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-12-14 06:40:25,285 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 55 for LOIs [2022-12-14 06:40:25,295 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 06:40:27,374 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 06:40:27,575 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-12-14 06:40:27,649 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 06:40:31,070 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 06:40:31,636 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 06:40:31,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:41:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1482681689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:42,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:41:42,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [8, 7, 8] total 46 [2022-12-14 06:41:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043333455] [2022-12-14 06:41:42,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:42,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 06:41:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 06:41:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:41:42,759 INFO L87 Difference]: Start difference. First operand 41480 states and 67360 transitions. Second operand has 29 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 16 states have internal predecessors, (84), 11 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-12-14 06:42:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:23,822 INFO L93 Difference]: Finished difference Result 82915 states and 134297 transitions. [2022-12-14 06:42:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 06:42:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 16 states have internal predecessors, (84), 11 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 159 [2022-12-14 06:42:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:24,000 INFO L225 Difference]: With dead ends: 82915 [2022-12-14 06:42:24,000 INFO L226 Difference]: Without dead ends: 41549 [2022-12-14 06:42:24,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 432 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 06:42:24,172 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 258 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 3961 SdHoareTripleChecker+Invalid, 5282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:24,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 3961 Invalid, 5282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [62 Valid, 5220 Invalid, 0 Unknown, 0 Unchecked, 21.6s Time] [2022-12-14 06:42:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41549 states. [2022-12-14 06:42:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41549 to 41482. [2022-12-14 06:42:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41482 states, 27488 states have (on average 1.4625291036088475) internal successors, (40202), 30322 states have internal predecessors, (40202), 11304 states have call successors, (11304), 2382 states have call predecessors, (11304), 2689 states have return successors, (15854), 10410 states have call predecessors, (15854), 11247 states have call successors, (15854) [2022-12-14 06:42:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41482 states to 41482 states and 67360 transitions. [2022-12-14 06:42:27,465 INFO L78 Accepts]: Start accepts. Automaton has 41482 states and 67360 transitions. Word has length 159 [2022-12-14 06:42:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:27,465 INFO L495 AbstractCegarLoop]: Abstraction has 41482 states and 67360 transitions. [2022-12-14 06:42:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 16 states have internal predecessors, (84), 11 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-12-14 06:42:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 41482 states and 67360 transitions. [2022-12-14 06:42:27,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-12-14 06:42:27,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:27,471 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:27,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 06:42:27,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 06:42:27,672 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1287614890, now seen corresponding path program 1 times [2022-12-14 06:42:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:27,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310719387] [2022-12-14 06:42:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 06:42:27,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:27,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310719387] [2022-12-14 06:42:27,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310719387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:27,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910093392] [2022-12-14 06:42:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:27,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:27,929 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:27,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 06:42:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:42:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:42:28,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 06:42:28,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910093392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149765479] [2022-12-14 06:42:28,666 INFO L159 IcfgInterpreter]: Started Sifa with 124 locations of interest [2022-12-14 06:42:28,666 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:28,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:28,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:28,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:32,325 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-12-14 06:42:41,617 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 490 for LOIs [2022-12-14 06:42:41,811 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 06:42:43,876 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 06:42:44,069 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-12-14 06:42:44,142 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 06:42:47,530 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 06:42:48,098 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 06:42:48,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:44:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [149765479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:44:17,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:44:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [8, 8, 9] total 50 [2022-12-14 06:44:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969512647] [2022-12-14 06:44:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:44:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 06:44:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:44:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 06:44:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 06:44:17,480 INFO L87 Difference]: Start difference. First operand 41482 states and 67360 transitions. Second operand has 31 states, 24 states have (on average 3.625) internal successors, (87), 17 states have internal predecessors, (87), 12 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-14 06:44:39,536 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 627 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:45:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:05,543 INFO L93 Difference]: Finished difference Result 82914 states and 134234 transitions. [2022-12-14 06:45:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 06:45:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 3.625) internal successors, (87), 17 states have internal predecessors, (87), 12 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 165 [2022-12-14 06:45:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:05,721 INFO L225 Difference]: With dead ends: 82914 [2022-12-14 06:45:05,721 INFO L226 Difference]: Without dead ends: 41548 [2022-12-14 06:45:05,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 442 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 109.7s TimeCoverageRelationStatistics Valid=359, Invalid=2611, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 06:45:05,896 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 286 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 5691 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 3988 SdHoareTripleChecker+Invalid, 5759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:05,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 3988 Invalid, 5759 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 5691 Invalid, 0 Unknown, 0 Unchecked, 24.1s Time] [2022-12-14 06:45:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2022-12-14 06:45:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 41481. [2022-12-14 06:45:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41481 states, 27489 states have (on average 1.4624758994506895) internal successors, (40202), 30323 states have internal predecessors, (40202), 11301 states have call successors, (11301), 2383 states have call predecessors, (11301), 2690 states have return successors, (15794), 10407 states have call predecessors, (15794), 11244 states have call successors, (15794) [2022-12-14 06:45:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41481 states to 41481 states and 67297 transitions. [2022-12-14 06:45:09,165 INFO L78 Accepts]: Start accepts. Automaton has 41481 states and 67297 transitions. Word has length 165 [2022-12-14 06:45:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:09,165 INFO L495 AbstractCegarLoop]: Abstraction has 41481 states and 67297 transitions. [2022-12-14 06:45:09,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 3.625) internal successors, (87), 17 states have internal predecessors, (87), 12 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-14 06:45:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41481 states and 67297 transitions. [2022-12-14 06:45:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 06:45:09,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:09,169 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:09,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 06:45:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:09,369 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash 629615526, now seen corresponding path program 1 times [2022-12-14 06:45:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:09,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974286375] [2022-12-14 06:45:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 06:45:10,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974286375] [2022-12-14 06:45:10,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974286375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:45:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955623119] [2022-12-14 06:45:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:10,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:10,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:10,141 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:10,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb41a144-56a3-4d12-98ec-41327f60d71a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 06:45:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:45:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 06:45:10,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:45:10,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955623119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:10,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:45:10,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-12-14 06:45:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883594084] [2022-12-14 06:45:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:10,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:45:10,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:45:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:45:10,346 INFO L87 Difference]: Start difference. First operand 41481 states and 67297 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21)