./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/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_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/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_166c53b8-0883-4194-b5db-af23748c5948/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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- 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 07:05:42,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:05:42,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:05:42,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:05:42,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:05:42,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:05:42,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:05:42,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:05:42,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:05:42,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:05:42,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:05:42,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:05:42,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:05:42,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:05:42,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:05:42,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:05:42,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:05:42,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:05:42,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:05:42,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:05:42,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:05:42,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:05:42,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:05:42,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:05:42,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:05:42,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:05:42,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:05:42,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:05:42,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:05:42,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:05:42,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:05:42,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:05:42,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:05:42,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:05:42,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:05:42,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:05:42,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:05:42,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:05:42,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:05:42,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:05:42,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:05:42,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:05:42,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:05:42,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:05:42,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:05:42,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:05:42,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:05:42,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:05:42,767 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:05:42,767 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:05:42,767 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:05:42,768 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:05:42,768 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:05:42,769 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:05:42,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:05:42,769 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:05:42,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:05:42,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:05:42,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:05:42,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:05:42,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:05:42,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:05:42,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:05:42,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:05:42,772 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_166c53b8-0883-4194-b5db-af23748c5948/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2022-12-14 07:05:42,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:05:42,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:05:42,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:05:42,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:05:42,958 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:05:42,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-12-14 07:05:45,590 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:05:45,825 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:05:45,826 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-12-14 07:05:45,842 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/data/ef89e3e40/6711bc64f1dd4f9285937d52a9ecf540/FLAG3f12b12d8 [2022-12-14 07:05:45,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/data/ef89e3e40/6711bc64f1dd4f9285937d52a9ecf540 [2022-12-14 07:05:45,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:05:45,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:05:45,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:05:45,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:05:45,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:05:45,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:05:45" (1/1) ... [2022-12-14 07:05:45,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6ef238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:45, skipping insertion in model container [2022-12-14 07:05:45,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:05:45" (1/1) ... [2022-12-14 07:05:45,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:05:45,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:05:46,252 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_166c53b8-0883-4194-b5db-af23748c5948/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-12-14 07:05:46,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:05:46,263 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:05:46,330 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_166c53b8-0883-4194-b5db-af23748c5948/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-12-14 07:05:46,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:05:46,346 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:05:46,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46 WrapperNode [2022-12-14 07:05:46,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:05:46,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:05:46,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:05:46,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:05:46,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,426 INFO L138 Inliner]: procedures = 89, calls = 329, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 1003 [2022-12-14 07:05:46,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:05:46,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:05:46,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:05:46,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:05:46,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:05:46,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:05:46,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:05:46,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:05:46,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (1/1) ... [2022-12-14 07:05:46,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:05:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:46,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:05:46,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:05:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:05:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 07:05:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 07:05:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 07:05:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 07:05:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 07:05:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 07:05:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 07:05:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 07:05:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 07:05:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 07:05:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 07:05:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 07:05:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 07:05:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 07:05:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 07:05:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 07:05:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 07:05:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 07:05:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 07:05:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 07:05:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 07:05:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 07:05:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 07:05:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 07:05:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 07:05:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 07:05:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 07:05:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 07:05:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 07:05:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 07:05:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 07:05:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 07:05:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 07:05:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 07:05:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 07:05:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 07:05:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:05:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 07:05:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 07:05:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 07:05:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 07:05:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 07:05:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 07:05:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:05:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:05:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 07:05:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 07:05:46,647 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:05:46,650 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:05:47,333 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:05:47,854 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:05:47,855 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:05:47,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:05:47 BoogieIcfgContainer [2022-12-14 07:05:47,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:05:47,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:05:47,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:05:47,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:05:47,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:05:45" (1/3) ... [2022-12-14 07:05:47,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163072f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:05:47, skipping insertion in model container [2022-12-14 07:05:47,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:46" (2/3) ... [2022-12-14 07:05:47,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163072f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:05:47, skipping insertion in model container [2022-12-14 07:05:47,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:05:47" (3/3) ... [2022-12-14 07:05:47,864 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2022-12-14 07:05:47,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:05:47,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:05:47,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:05:47,926 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;@108aa395, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:05:47,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:05:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-12-14 07:05:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 07:05:47,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:47,944 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-12-14 07:05:47,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash -68213645, now seen corresponding path program 1 times [2022-12-14 07:05:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292227243] [2022-12-14 07:05:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 07:05:48,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292227243] [2022-12-14 07:05:48,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292227243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:48,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:05:48,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:05:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477030253] [2022-12-14 07:05:48,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:05:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:05:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:05:48,385 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 07:05:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:48,826 INFO L93 Difference]: Finished difference Result 1024 states and 1639 transitions. [2022-12-14 07:05:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:05:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 72 [2022-12-14 07:05:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:48,844 INFO L225 Difference]: With dead ends: 1024 [2022-12-14 07:05:48,845 INFO L226 Difference]: Without dead ends: 678 [2022-12-14 07:05:48,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:05:48,855 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 1166 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:48,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 2707 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:05:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-12-14 07:05:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 664. [2022-12-14 07:05:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 448 states have (on average 1.5691964285714286) internal successors, (703), 476 states have internal predecessors, (703), 174 states have call successors, (174), 42 states have call predecessors, (174), 41 states have return successors, (178), 170 states have call predecessors, (178), 172 states have call successors, (178) [2022-12-14 07:05:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1055 transitions. [2022-12-14 07:05:48,967 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1055 transitions. Word has length 72 [2022-12-14 07:05:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:48,968 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1055 transitions. [2022-12-14 07:05:48,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 07:05:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1055 transitions. [2022-12-14 07:05:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 07:05:48,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:48,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:05:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:05:48,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 767995862, now seen corresponding path program 1 times [2022-12-14 07:05:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776456481] [2022-12-14 07:05:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:05:49,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776456481] [2022-12-14 07:05:49,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776456481] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:49,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:05:49,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:05:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267627083] [2022-12-14 07:05:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:49,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:05:49,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:05:49,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:05:49,207 INFO L87 Difference]: Start difference. First operand 664 states and 1055 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 07:05:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:49,646 INFO L93 Difference]: Finished difference Result 1009 states and 1605 transitions. [2022-12-14 07:05:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:05:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-12-14 07:05:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:49,651 INFO L225 Difference]: With dead ends: 1009 [2022-12-14 07:05:49,651 INFO L226 Difference]: Without dead ends: 676 [2022-12-14 07:05:49,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:05:49,654 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 515 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:49,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2247 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:05:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-12-14 07:05:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 670. [2022-12-14 07:05:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 451 states have (on average 1.565410199556541) internal successors, (706), 481 states have internal predecessors, (706), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (183), 170 states have call predecessors, (183), 174 states have call successors, (183) [2022-12-14 07:05:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1065 transitions. [2022-12-14 07:05:49,683 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1065 transitions. Word has length 73 [2022-12-14 07:05:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:49,684 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1065 transitions. [2022-12-14 07:05:49,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 07:05:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1065 transitions. [2022-12-14 07:05:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 07:05:49,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:49,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:05:49,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:05:49,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash -457667671, now seen corresponding path program 1 times [2022-12-14 07:05:49,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:49,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186620271] [2022-12-14 07:05:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:49,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:05:49,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186620271] [2022-12-14 07:05:49,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186620271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:49,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:05:49,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:05:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567348510] [2022-12-14 07:05:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:49,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:05:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:05:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:05:49,917 INFO L87 Difference]: Start difference. First operand 670 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 07:05:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:50,438 INFO L93 Difference]: Finished difference Result 767 states and 1212 transitions. [2022-12-14 07:05:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:05:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-12-14 07:05:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:50,443 INFO L225 Difference]: With dead ends: 767 [2022-12-14 07:05:50,444 INFO L226 Difference]: Without dead ends: 765 [2022-12-14 07:05:50,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:05:50,445 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:50,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:05:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-12-14 07:05:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 755. [2022-12-14 07:05:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 502 states have (on average 1.5318725099601593) internal successors, (769), 532 states have internal predecessors, (769), 198 states have call successors, (198), 56 states have call predecessors, (198), 54 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-12-14 07:05:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1178 transitions. [2022-12-14 07:05:50,496 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1178 transitions. Word has length 77 [2022-12-14 07:05:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:50,497 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1178 transitions. [2022-12-14 07:05:50,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 07:05:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1178 transitions. [2022-12-14 07:05:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 07:05:50,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:50,500 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-12-14 07:05:50,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:05:50,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash 120132025, now seen corresponding path program 1 times [2022-12-14 07:05:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760245134] [2022-12-14 07:05:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 07:05:50,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:50,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760245134] [2022-12-14 07:05:50,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760245134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:50,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:05:50,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:05:50,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676030105] [2022-12-14 07:05:50,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:50,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:05:50,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:05:50,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:05:50,665 INFO L87 Difference]: Start difference. First operand 755 states and 1178 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:05:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:50,818 INFO L93 Difference]: Finished difference Result 1536 states and 2426 transitions. [2022-12-14 07:05:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:05:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-12-14 07:05:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:50,824 INFO L225 Difference]: With dead ends: 1536 [2022-12-14 07:05:50,825 INFO L226 Difference]: Without dead ends: 793 [2022-12-14 07:05:50,839 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 07:05:50,840 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:50,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:05:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-12-14 07:05:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 759. [2022-12-14 07:05:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 536 states have internal predecessors, (773), 198 states have call successors, (198), 56 states have call predecessors, (198), 54 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-12-14 07:05:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1182 transitions. [2022-12-14 07:05:50,888 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1182 transitions. Word has length 108 [2022-12-14 07:05:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:50,888 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1182 transitions. [2022-12-14 07:05:50,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:05:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1182 transitions. [2022-12-14 07:05:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 07:05:50,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:50,892 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2022-12-14 07:05:50,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:05:50,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1032740436, now seen corresponding path program 1 times [2022-12-14 07:05:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:50,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146450735] [2022-12-14 07:05:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 07:05:51,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:51,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146450735] [2022-12-14 07:05:51,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146450735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:51,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146287757] [2022-12-14 07:05:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:51,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:51,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:51,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:51,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:05:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:05:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 07:05:51,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:05:51,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146287757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:51,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:05:51,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:05:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480802229] [2022-12-14 07:05:51,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:51,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:05:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:05:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:05:51,307 INFO L87 Difference]: Start difference. First operand 759 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:51,573 INFO L93 Difference]: Finished difference Result 1584 states and 2514 transitions. [2022-12-14 07:05:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:05:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-12-14 07:05:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:51,581 INFO L225 Difference]: With dead ends: 1584 [2022-12-14 07:05:51,582 INFO L226 Difference]: Without dead ends: 837 [2022-12-14 07:05:51,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:05:51,590 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:51,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:05:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-12-14 07:05:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 837. [2022-12-14 07:05:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 582 states have (on average 1.5790378006872852) internal successors, (919), 612 states have internal predecessors, (919), 198 states have call successors, (198), 58 states have call predecessors, (198), 56 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-12-14 07:05:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1328 transitions. [2022-12-14 07:05:51,625 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1328 transitions. Word has length 111 [2022-12-14 07:05:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:51,625 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 1328 transitions. [2022-12-14 07:05:51,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1328 transitions. [2022-12-14 07:05:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 07:05:51,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:51,627 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2022-12-14 07:05:51,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:51,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:51,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2046590831, now seen corresponding path program 1 times [2022-12-14 07:05:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:51,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213654884] [2022-12-14 07:05:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 07:05:51,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213654884] [2022-12-14 07:05:51,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213654884] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294252043] [2022-12-14 07:05:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:51,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:51,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:51,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:05:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:52,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:05:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 07:05:52,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:05:52,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294252043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:52,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:05:52,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:05:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469811287] [2022-12-14 07:05:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:52,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:05:52,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:05:52,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:05:52,241 INFO L87 Difference]: Start difference. First operand 837 states and 1328 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:52,491 INFO L93 Difference]: Finished difference Result 1740 states and 2804 transitions. [2022-12-14 07:05:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:05:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-12-14 07:05:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:52,496 INFO L225 Difference]: With dead ends: 1740 [2022-12-14 07:05:52,497 INFO L226 Difference]: Without dead ends: 915 [2022-12-14 07:05:52,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:05:52,501 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:52,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:05:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-12-14 07:05:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2022-12-14 07:05:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 658 states have (on average 1.6185410334346504) internal successors, (1065), 688 states have internal predecessors, (1065), 198 states have call successors, (198), 60 states have call predecessors, (198), 58 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-12-14 07:05:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1474 transitions. [2022-12-14 07:05:52,532 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1474 transitions. Word has length 116 [2022-12-14 07:05:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:52,533 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1474 transitions. [2022-12-14 07:05:52,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1474 transitions. [2022-12-14 07:05:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 07:05:52,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:52,535 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:52,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:05:52,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:52,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1539875583, now seen corresponding path program 1 times [2022-12-14 07:05:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:52,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172845256] [2022-12-14 07:05:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:52,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 07:05:52,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172845256] [2022-12-14 07:05:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172845256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291685854] [2022-12-14 07:05:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:52,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:52,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:52,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:05:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:05:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:05:53,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:05:53,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291685854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:53,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:05:53,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:05:53,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210001568] [2022-12-14 07:05:53,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:53,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:05:53,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:53,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:05:53,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:05:53,076 INFO L87 Difference]: Start difference. First operand 915 states and 1474 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:53,305 INFO L93 Difference]: Finished difference Result 1896 states and 3094 transitions. [2022-12-14 07:05:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:05:53,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-12-14 07:05:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:53,309 INFO L225 Difference]: With dead ends: 1896 [2022-12-14 07:05:53,309 INFO L226 Difference]: Without dead ends: 993 [2022-12-14 07:05:53,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:05:53,315 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:53,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:05:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-12-14 07:05:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2022-12-14 07:05:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 734 states have (on average 1.6498637602179838) internal successors, (1211), 764 states have internal predecessors, (1211), 198 states have call successors, (198), 62 states have call predecessors, (198), 60 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-12-14 07:05:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1620 transitions. [2022-12-14 07:05:53,348 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1620 transitions. Word has length 120 [2022-12-14 07:05:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:53,348 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1620 transitions. [2022-12-14 07:05:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1620 transitions. [2022-12-14 07:05:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 07:05:53,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:53,351 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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 07:05:53,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:05:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:53,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2104691148, now seen corresponding path program 1 times [2022-12-14 07:05:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982452780] [2022-12-14 07:05:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 07:05:53,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:53,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982452780] [2022-12-14 07:05:53,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982452780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844157511] [2022-12-14 07:05:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:53,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:53,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:53,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:53,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:05:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:53,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:05:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:05:53,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:05:53,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844157511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:53,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:05:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:05:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326256847] [2022-12-14 07:05:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:53,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:05:53,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:05:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:05:53,908 INFO L87 Difference]: Start difference. First operand 993 states and 1620 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:54,124 INFO L93 Difference]: Finished difference Result 2052 states and 3384 transitions. [2022-12-14 07:05:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:05:54,125 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), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-12-14 07:05:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:54,131 INFO L225 Difference]: With dead ends: 2052 [2022-12-14 07:05:54,131 INFO L226 Difference]: Without dead ends: 1071 [2022-12-14 07:05:54,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:05:54,137 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:54,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:05:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-12-14 07:05:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1071. [2022-12-14 07:05:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 810 states have (on average 1.6753086419753087) internal successors, (1357), 840 states have internal predecessors, (1357), 198 states have call successors, (198), 64 states have call predecessors, (198), 62 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-12-14 07:05:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1766 transitions. [2022-12-14 07:05:54,188 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1766 transitions. Word has length 123 [2022-12-14 07:05:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:54,188 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1766 transitions. [2022-12-14 07:05:54,188 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), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1766 transitions. [2022-12-14 07:05:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 07:05:54,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:54,192 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2022-12-14 07:05:54,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:05:54,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 07:05:54,394 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash 838594778, now seen corresponding path program 1 times [2022-12-14 07:05:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:54,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996848353] [2022-12-14 07:05:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 07:05:54,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996848353] [2022-12-14 07:05:54,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996848353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613670023] [2022-12-14 07:05:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:54,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:54,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:54,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:54,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:05:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 07:05:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 07:05:56,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:23,409 WARN L233 SmtUtils]: Spent 24.88s on a formula simplification. DAG size of input: 1449 DAG size of output: 59 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 07:06:52,848 WARN L233 SmtUtils]: Spent 26.52s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 07:07:19,407 WARN L233 SmtUtils]: Spent 25.99s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 07:07:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 07:07:20,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613670023] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:07:20,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:07:20,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 15] total 36 [2022-12-14 07:07:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126105912] [2022-12-14 07:07:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 07:07:20,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:07:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 07:07:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:07:20,952 INFO L87 Difference]: Start difference. First operand 1071 states and 1766 transitions. Second operand has 18 states, 12 states have (on average 5.5) internal successors, (66), 14 states have internal predecessors, (66), 6 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2022-12-14 07:07:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:26,895 INFO L93 Difference]: Finished difference Result 3099 states and 5179 transitions. [2022-12-14 07:07:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 07:07:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 5.5) internal successors, (66), 14 states have internal predecessors, (66), 6 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 125 [2022-12-14 07:07:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:26,906 INFO L225 Difference]: With dead ends: 3099 [2022-12-14 07:07:26,907 INFO L226 Difference]: Without dead ends: 2041 [2022-12-14 07:07:26,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=405, Invalid=2565, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 07:07:26,912 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 1619 mSDsluCounter, 4359 mSDsCounter, 0 mSdLazyCounter, 6246 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 5248 SdHoareTripleChecker+Invalid, 6602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 6246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:26,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 5248 Invalid, 6602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 6246 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-12-14 07:07:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2022-12-14 07:07:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1895. [2022-12-14 07:07:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1449 states have (on average 1.697032436162871) internal successors, (2459), 1507 states have internal predecessors, (2459), 337 states have call successors, (337), 109 states have call predecessors, (337), 108 states have return successors, (362), 326 states have call predecessors, (362), 333 states have call successors, (362) [2022-12-14 07:07:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3158 transitions. [2022-12-14 07:07:27,072 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3158 transitions. Word has length 125 [2022-12-14 07:07:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:27,072 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 3158 transitions. [2022-12-14 07:07:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 5.5) internal successors, (66), 14 states have internal predecessors, (66), 6 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2022-12-14 07:07:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3158 transitions. [2022-12-14 07:07:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-12-14 07:07:27,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:27,077 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:07:27,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:07:27,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 07:07:27,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:07:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash -644734140, now seen corresponding path program 1 times [2022-12-14 07:07:27,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:07:27,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387508207] [2022-12-14 07:07:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:27,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:07:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-12-14 07:07:27,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:07:27,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387508207] [2022-12-14 07:07:27,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387508207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:27,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:27,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:07:27,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700057882] [2022-12-14 07:07:27,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:27,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:07:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:07:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:07:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:07:27,529 INFO L87 Difference]: Start difference. First operand 1895 states and 3158 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 07:07:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:27,782 INFO L93 Difference]: Finished difference Result 2508 states and 4173 transitions. [2022-12-14 07:07:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:07:27,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 236 [2022-12-14 07:07:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:27,790 INFO L225 Difference]: With dead ends: 2508 [2022-12-14 07:07:27,790 INFO L226 Difference]: Without dead ends: 1926 [2022-12-14 07:07:27,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:07:27,795 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 16 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:27,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2566 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:07:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-12-14 07:07:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1910. [2022-12-14 07:07:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1461 states have (on average 1.6913073237508556) internal successors, (2471), 1519 states have internal predecessors, (2471), 337 states have call successors, (337), 109 states have call predecessors, (337), 111 states have return successors, (368), 329 states have call predecessors, (368), 333 states have call successors, (368) [2022-12-14 07:07:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3176 transitions. [2022-12-14 07:07:27,915 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3176 transitions. Word has length 236 [2022-12-14 07:07:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 3176 transitions. [2022-12-14 07:07:27,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 07:07:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3176 transitions. [2022-12-14 07:07:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-12-14 07:07:27,924 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:27,924 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-12-14 07:07:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:07:27,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:07:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash 561954285, now seen corresponding path program 1 times [2022-12-14 07:07:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:07:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595830636] [2022-12-14 07:07:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:07:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-12-14 07:07:28,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:07:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595830636] [2022-12-14 07:07:28,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595830636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:07:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012613643] [2022-12-14 07:07:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:07:28,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:07:28,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:07:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 07:07:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 155 proven. 7 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-12-14 07:07:29,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:00,501 WARN L233 SmtUtils]: Spent 27.37s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 07:08:27,091 WARN L233 SmtUtils]: Spent 25.97s on a formula simplification. DAG size of input: 1457 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 07:08:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-12-14 07:08:28,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012613643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:28,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507610715] [2022-12-14 07:08:28,494 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2022-12-14 07:08:28,494 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:08:28,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:08:28,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:08:28,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:08:34,108 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-12-14 07:08:41,414 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 40 for LOIs [2022-12-14 07:08:41,671 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 18 for LOIs [2022-12-14 07:08:41,687 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 75 for LOIs [2022-12-14 07:08:41,991 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 48 for LOIs [2022-12-14 07:08:42,001 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-12-14 07:08:42,002 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-12-14 07:08:45,380 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 07:08:45,948 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 18 for LOIs [2022-12-14 07:08:45,992 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 42 for LOIs [2022-12-14 07:08:46,002 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-12-14 07:08:46,047 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 29 for LOIs [2022-12-14 07:08:46,050 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 07:08:46,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:09:39,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41503#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 4 ~executiveFloor~0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483647) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483648)) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 07:09:39,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:09:39,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:09:39,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 21, 19] total 43 [2022-12-14 07:09:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604272448] [2022-12-14 07:09:39,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:09:39,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 07:09:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:09:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 07:09:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1052, Invalid=16770, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 07:09:39,946 INFO L87 Difference]: Start difference. First operand 1910 states and 3176 transitions. Second operand has 43 states, 30 states have (on average 7.3) internal successors, (219), 34 states have internal predecessors, (219), 17 states have call successors, (77), 10 states have call predecessors, (77), 19 states have return successors, (76), 18 states have call predecessors, (76), 17 states have call successors, (76) [2022-12-14 07:10:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:06,323 INFO L93 Difference]: Finished difference Result 5350 states and 8784 transitions. [2022-12-14 07:10:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-12-14 07:10:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 30 states have (on average 7.3) internal successors, (219), 34 states have internal predecessors, (219), 17 states have call successors, (77), 10 states have call predecessors, (77), 19 states have return successors, (76), 18 states have call predecessors, (76), 17 states have call successors, (76) Word has length 237 [2022-12-14 07:10:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:06,337 INFO L225 Difference]: With dead ends: 5350 [2022-12-14 07:10:06,338 INFO L226 Difference]: Without dead ends: 3451 [2022-12-14 07:10:06,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 626 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24123 ImplicationChecksByTransitivity, 62.1s TimeCoverageRelationStatistics Valid=4028, Invalid=56734, Unknown=0, NotChecked=0, Total=60762 [2022-12-14 07:10:06,353 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 10525 mSDsluCounter, 7258 mSDsCounter, 0 mSdLazyCounter, 30647 mSolverCounterSat, 7695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10552 SdHoareTripleChecker+Valid, 7809 SdHoareTripleChecker+Invalid, 38342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7695 IncrementalHoareTripleChecker+Valid, 30647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:06,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10552 Valid, 7809 Invalid, 38342 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7695 Valid, 30647 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2022-12-14 07:10:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2022-12-14 07:10:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 2771. [2022-12-14 07:10:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 1918 states have (on average 1.4895724713242962) internal successors, (2857), 2033 states have internal predecessors, (2857), 624 states have call successors, (624), 218 states have call predecessors, (624), 228 states have return successors, (728), 599 states have call predecessors, (728), 619 states have call successors, (728) [2022-12-14 07:10:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4209 transitions. [2022-12-14 07:10:06,616 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4209 transitions. Word has length 237 [2022-12-14 07:10:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:06,617 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 4209 transitions. [2022-12-14 07:10:06,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 30 states have (on average 7.3) internal successors, (219), 34 states have internal predecessors, (219), 17 states have call successors, (77), 10 states have call predecessors, (77), 19 states have return successors, (76), 18 states have call predecessors, (76), 17 states have call successors, (76) [2022-12-14 07:10:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4209 transitions. [2022-12-14 07:10:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 07:10:06,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:06,625 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 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] [2022-12-14 07:10:06,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:10:06,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:06,826 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:10:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash 941176252, now seen corresponding path program 1 times [2022-12-14 07:10:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:06,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218938733] [2022-12-14 07:10:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-14 07:10:06,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:10:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218938733] [2022-12-14 07:10:06,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218938733] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:10:06,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:10:06,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:10:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173009459] [2022-12-14 07:10:06,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:10:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:10:06,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:10:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:10:06,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:10:06,991 INFO L87 Difference]: Start difference. First operand 2771 states and 4209 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:10:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:07,412 INFO L93 Difference]: Finished difference Result 5702 states and 8708 transitions. [2022-12-14 07:10:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:10:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 186 [2022-12-14 07:10:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:07,425 INFO L225 Difference]: With dead ends: 5702 [2022-12-14 07:10:07,425 INFO L226 Difference]: Without dead ends: 2883 [2022-12-14 07:10:07,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:10:07,435 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 99 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:07,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:10:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-12-14 07:10:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2883. [2022-12-14 07:10:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2022 states have (on average 1.4416419386745796) internal successors, (2915), 2137 states have internal predecessors, (2915), 624 states have call successors, (624), 226 states have call predecessors, (624), 236 states have return successors, (728), 599 states have call predecessors, (728), 619 states have call successors, (728) [2022-12-14 07:10:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 4267 transitions. [2022-12-14 07:10:07,743 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 4267 transitions. Word has length 186 [2022-12-14 07:10:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:07,744 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 4267 transitions. [2022-12-14 07:10:07,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:10:07,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 4267 transitions. [2022-12-14 07:10:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-14 07:10:07,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:07,755 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:10:07,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:10:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1225161841, now seen corresponding path program 1 times [2022-12-14 07:10:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:07,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839304481] [2022-12-14 07:10:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-12-14 07:10:08,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:10:08,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839304481] [2022-12-14 07:10:08,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839304481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:10:08,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287443235] [2022-12-14 07:10:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:08,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:10:08,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:10:08,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:10:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 07:10:08,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 07:10:08,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:10:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-14 07:10:13,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287443235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:10:13,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100218714] [2022-12-14 07:10:13,944 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-12-14 07:10:13,944 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:10:13,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:10:13,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:10:13,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:10:17,665 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-12-14 07:10:27,542 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2022-12-14 07:10:27,599 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 37 for LOIs [2022-12-14 07:10:27,631 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 79 for LOIs [2022-12-14 07:10:27,977 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 55 for LOIs [2022-12-14 07:10:27,988 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 37 for LOIs [2022-12-14 07:10:27,991 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-12-14 07:10:31,402 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 07:10:31,971 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 18 for LOIs [2022-12-14 07:10:32,014 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2022-12-14 07:10:32,020 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-12-14 07:10:32,053 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2022-12-14 07:10:32,055 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 07:10:32,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:11:27,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65788#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 07:11:27,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:11:27,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:11:27,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14] total 34 [2022-12-14 07:11:27,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624060755] [2022-12-14 07:11:27,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:11:27,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 07:11:27,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 07:11:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=12976, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 07:11:27,172 INFO L87 Difference]: Start difference. First operand 2883 states and 4267 transitions. Second operand has 34 states, 25 states have (on average 7.2) internal successors, (180), 26 states have internal predecessors, (180), 12 states have call successors, (65), 7 states have call predecessors, (65), 15 states have return successors, (66), 19 states have call predecessors, (66), 12 states have call successors, (66) [2022-12-14 07:11:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:47,334 INFO L93 Difference]: Finished difference Result 6720 states and 10249 transitions. [2022-12-14 07:11:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-14 07:11:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 7.2) internal successors, (180), 26 states have internal predecessors, (180), 12 states have call successors, (65), 7 states have call predecessors, (65), 15 states have return successors, (66), 19 states have call predecessors, (66), 12 states have call successors, (66) Word has length 187 [2022-12-14 07:11:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:47,348 INFO L225 Difference]: With dead ends: 6720 [2022-12-14 07:11:47,348 INFO L226 Difference]: Without dead ends: 4745 [2022-12-14 07:11:47,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 462 SyntacticMatches, 24 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19530 ImplicationChecksByTransitivity, 60.0s TimeCoverageRelationStatistics Valid=2949, Invalid=44357, Unknown=0, NotChecked=0, Total=47306 [2022-12-14 07:11:47,360 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 7932 mSDsluCounter, 7152 mSDsCounter, 0 mSdLazyCounter, 25616 mSolverCounterSat, 5611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7949 SdHoareTripleChecker+Valid, 7865 SdHoareTripleChecker+Invalid, 31227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5611 IncrementalHoareTripleChecker+Valid, 25616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:47,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7949 Valid, 7865 Invalid, 31227 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5611 Valid, 25616 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2022-12-14 07:11:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2022-12-14 07:11:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4331. [2022-12-14 07:11:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 3177 states have (on average 1.4689959080893924) internal successors, (4667), 3317 states have internal predecessors, (4667), 816 states have call successors, (816), 330 states have call predecessors, (816), 337 states have return successors, (928), 786 states have call predecessors, (928), 810 states have call successors, (928) [2022-12-14 07:11:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6411 transitions. [2022-12-14 07:11:47,693 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6411 transitions. Word has length 187 [2022-12-14 07:11:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:47,694 INFO L495 AbstractCegarLoop]: Abstraction has 4331 states and 6411 transitions. [2022-12-14 07:11:47,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 7.2) internal successors, (180), 26 states have internal predecessors, (180), 12 states have call successors, (65), 7 states have call predecessors, (65), 15 states have return successors, (66), 19 states have call predecessors, (66), 12 states have call successors, (66) [2022-12-14 07:11:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6411 transitions. [2022-12-14 07:11:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-12-14 07:11:47,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:47,698 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 07:11:47,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:11:47,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:47,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2058996960, now seen corresponding path program 1 times [2022-12-14 07:11:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:47,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028015293] [2022-12-14 07:11:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:47,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-12-14 07:11:48,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028015293] [2022-12-14 07:11:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028015293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:11:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890270685] [2022-12-14 07:11:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:11:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:11:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:11:48,085 INFO L87 Difference]: Start difference. First operand 4331 states and 6411 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 4 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 07:11:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:48,583 INFO L93 Difference]: Finished difference Result 8028 states and 12078 transitions. [2022-12-14 07:11:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:11:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 4 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 200 [2022-12-14 07:11:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:48,598 INFO L225 Difference]: With dead ends: 8028 [2022-12-14 07:11:48,598 INFO L226 Difference]: Without dead ends: 4343 [2022-12-14 07:11:48,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:11:48,607 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 366 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:48,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1720 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2022-12-14 07:11:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 4335. [2022-12-14 07:11:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 3179 states have (on average 1.4510852469329978) internal successors, (4613), 3321 states have internal predecessors, (4613), 816 states have call successors, (816), 330 states have call predecessors, (816), 339 states have return successors, (932), 786 states have call predecessors, (932), 810 states have call successors, (932) [2022-12-14 07:11:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 6361 transitions. [2022-12-14 07:11:48,939 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 6361 transitions. Word has length 200 [2022-12-14 07:11:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:48,939 INFO L495 AbstractCegarLoop]: Abstraction has 4335 states and 6361 transitions. [2022-12-14 07:11:48,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 4 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 07:11:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 6361 transitions. [2022-12-14 07:11:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 07:11:48,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:48,944 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 07:11:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:11:48,944 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2081544012, now seen corresponding path program 1 times [2022-12-14 07:11:48,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:48,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840400318] [2022-12-14 07:11:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-12-14 07:11:49,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840400318] [2022-12-14 07:11:49,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840400318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792574455] [2022-12-14 07:11:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:49,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:49,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:49,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:11:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:11:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 07:11:49,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 07:11:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792574455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7559316] [2022-12-14 07:11:49,408 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 07:11:49,408 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:11:49,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:11:49,408 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:11:49,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:11:52,911 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-12-14 07:12:00,179 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2022-12-14 07:12:00,347 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 37 for LOIs [2022-12-14 07:12:00,381 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 75 for LOIs [2022-12-14 07:12:00,626 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 51 for LOIs [2022-12-14 07:12:00,636 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-12-14 07:12:00,640 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-12-14 07:12:04,016 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 07:12:04,585 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 18 for LOIs [2022-12-14 07:12:04,630 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 42 for LOIs [2022-12-14 07:12:04,640 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 44 for LOIs [2022-12-14 07:12:04,677 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 63 for LOIs [2022-12-14 07:12:04,685 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 07:12:04,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:12:58,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '98300#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 07:12:58,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:12:58,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:12:58,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-12-14 07:12:58,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307012886] [2022-12-14 07:12:58,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:12:58,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:12:58,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:58,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:12:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=9275, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 07:12:58,738 INFO L87 Difference]: Start difference. First operand 4335 states and 6361 transitions. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 07:12:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:59,336 INFO L93 Difference]: Finished difference Result 7885 states and 11778 transitions. [2022-12-14 07:12:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:12:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 202 [2022-12-14 07:12:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:59,349 INFO L225 Difference]: With dead ends: 7885 [2022-12-14 07:12:59,349 INFO L226 Difference]: Without dead ends: 4801 [2022-12-14 07:12:59,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 498 SyntacticMatches, 16 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=844, Invalid=9662, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 07:12:59,358 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 253 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:59,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 2602 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:12:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2022-12-14 07:12:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 4715. [2022-12-14 07:12:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3407 states have (on average 1.4291165248018785) internal successors, (4869), 3581 states have internal predecessors, (4869), 934 states have call successors, (934), 360 states have call predecessors, (934), 373 states have return successors, (1084), 894 states have call predecessors, (1084), 928 states have call successors, (1084) [2022-12-14 07:12:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 6887 transitions. [2022-12-14 07:12:59,715 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 6887 transitions. Word has length 202 [2022-12-14 07:12:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:59,715 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 6887 transitions. [2022-12-14 07:12:59,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 07:12:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 6887 transitions. [2022-12-14 07:12:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-12-14 07:12:59,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:59,719 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 07:12:59,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:12:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 07:12:59,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:12:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1045426608, now seen corresponding path program 1 times [2022-12-14 07:12:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:59,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475642271] [2022-12-14 07:12:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 67 proven. 41 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-12-14 07:13:00,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:13:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475642271] [2022-12-14 07:13:00,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475642271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:13:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619093655] [2022-12-14 07:13:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:13:00,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:13:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:13:00,101 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:13:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:13:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:13:00,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:13:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 239 proven. 10 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-14 07:13:00,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:13:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 67 proven. 43 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2022-12-14 07:13:00,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619093655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:13:00,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615394012] [2022-12-14 07:13:00,593 INFO L159 IcfgInterpreter]: Started Sifa with 128 locations of interest [2022-12-14 07:13:00,593 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:13:00,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:13:00,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:13:00,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:13:05,386 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-12-14 07:13:12,535 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2022-12-14 07:13:12,748 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 37 for LOIs [2022-12-14 07:13:12,800 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 37 for LOIs [2022-12-14 07:13:13,062 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-12-14 07:13:13,073 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-12-14 07:13:13,077 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-12-14 07:13:16,471 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 07:13:17,040 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 18 for LOIs [2022-12-14 07:13:17,084 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 42 for LOIs [2022-12-14 07:13:17,094 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 44 for LOIs [2022-12-14 07:13:17,131 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 63 for LOIs [2022-12-14 07:13:17,139 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 07:13:17,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:14:13,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '116917#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 07:14:13,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:14:13,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:14:13,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-12-14 07:14:13,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396294257] [2022-12-14 07:14:13,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:14:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:14:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:14:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=12087, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 07:14:13,307 INFO L87 Difference]: Start difference. First operand 4715 states and 6887 transitions. Second operand has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 4 states have call successors, (41), 2 states have call predecessors, (41), 6 states have return successors, (42), 4 states have call predecessors, (42), 4 states have call successors, (42) [2022-12-14 07:14:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:14,230 INFO L93 Difference]: Finished difference Result 8827 states and 13169 transitions. [2022-12-14 07:14:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:14:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 4 states have call successors, (41), 2 states have call predecessors, (41), 6 states have return successors, (42), 4 states have call predecessors, (42), 4 states have call successors, (42) Word has length 314 [2022-12-14 07:14:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:14,252 INFO L225 Difference]: With dead ends: 8827 [2022-12-14 07:14:14,252 INFO L226 Difference]: Without dead ends: 5363 [2022-12-14 07:14:14,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 815 SyntacticMatches, 23 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5999 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=1083, Invalid=12959, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 07:14:14,260 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 413 mSDsluCounter, 4302 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 4916 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:14:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2022-12-14 07:14:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 4953. [2022-12-14 07:14:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4953 states, 3569 states have (on average 1.4177640795741104) internal successors, (5060), 3759 states have internal predecessors, (5060), 993 states have call successors, (993), 375 states have call predecessors, (993), 390 states have return successors, (1130), 948 states have call predecessors, (1130), 987 states have call successors, (1130) [2022-12-14 07:14:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4953 states to 4953 states and 7183 transitions. [2022-12-14 07:14:14,644 INFO L78 Accepts]: Start accepts. Automaton has 4953 states and 7183 transitions. Word has length 314 [2022-12-14 07:14:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:14,644 INFO L495 AbstractCegarLoop]: Abstraction has 4953 states and 7183 transitions. [2022-12-14 07:14:14,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 4 states have call successors, (41), 2 states have call predecessors, (41), 6 states have return successors, (42), 4 states have call predecessors, (42), 4 states have call successors, (42) [2022-12-14 07:14:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4953 states and 7183 transitions. [2022-12-14 07:14:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-12-14 07:14:14,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:14,649 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:14,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:14:14,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:14:14,850 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash -782731213, now seen corresponding path program 1 times [2022-12-14 07:14:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:14,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174793624] [2022-12-14 07:14:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:14,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 60 proven. 92 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-12-14 07:14:16,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:16,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174793624] [2022-12-14 07:14:16,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174793624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:14:16,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685153038] [2022-12-14 07:14:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:16,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:14:16,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:14:16,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:14:16,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_166c53b8-0883-4194-b5db-af23748c5948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:14:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 07:14:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:14:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 271 proven. 122 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 07:14:17,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:14:19,387 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:14:24,893 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:14:25,200 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:14:30,944 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:14:31,222 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:14:37,048 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:14:37,133 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 07:17:12,954 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.